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Quadratic Identities
Quadratic Identities
   If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2
  for more than 2 values of x, then;
Quadratic Identities
   If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2
  for more than 2 values of x, then;
                    a1  a2
Quadratic Identities
   If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2
  for more than 2 values of x, then;
                    a1  a2
                    b1  b2
Quadratic Identities
   If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2
  for more than 2 values of x, then;
                    a1  a2
                    b1  b2
                    c1  c2
Quadratic Identities
                 If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2
                for more than 2 values of x, then;
                                  a1  a2
                                  b1  b2
                                  c1  c2

e.g. Find A, B and C if;
               2 x2  7 x  4  A x  2  B  x  2  C
                                           2
Quadratic Identities
                 If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2
                for more than 2 values of x, then;
                                  a1  a2
                                  b1  b2
                                  c1  c2

e.g. Find A, B and C if;
               2 x2  7 x  4  A x  2  B  x  2  C
                                           2


                              A x2  4 x  4  B  x  2  C
Quadratic Identities
                 If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2
                for more than 2 values of x, then;
                                  a1  a2
                                  b1  b2
                                  c1  c2

e.g. Find A, B and C if;
               2 x2  7 x  4  A x  2  B  x  2  C
                                           2


                              A x2  4 x  4  B  x  2  C
                               Ax 2  4 Ax  4 A  Bx  2 B  C
Quadratic Identities
                 If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2
                for more than 2 values of x, then;
                                  a1  a2
                                  b1  b2
                                  c1  c2

e.g. Find A, B and C if;
               2 x2  7 x  4  A x  2  B  x  2  C
                                           2


                              A x2  4 x  4  B  x  2  C
                               Ax 2  4 Ax  4 A  Bx  2 B  C
                               Ax 2   4 A  B  x   4 A  2 B  C 
A2
A2   4 A  B  7
A2   4 A  B  7
        8  B  7
A2   4 A  B  7
        8  B  7
            B  15
A2   4 A  B  7    4 A  2 B  C  4
        8  B  7
            B  15
A2   4 A  B  7    4 A  2 B  C  4
        8  B  7       8  30  C  4
            B  15
A2   4 A  B  7    4 A  2 B  C  4
        8  B  7       8  30  C  4
            B  15               C  18
A2       4 A  B  7           4 A  2 B  C  4
            8  B  7              8  30  C  4
                B  15                      C  18
       A  2, B  15, C  18
A2              4 A  B  7              4 A  2 B  C  4
                   8  B  7                 8  30  C  4
                       B  15                         C  18
              A  2, B  15, C  18
                       OR
      2x  7 x  4  A x  2  B  x  2  C
        2                     2
A2              4 A  B  7              4 A  2 B  C  4
                       8  B  7                 8  30  C  4
                           B  15                         C  18
                  A  2, B  15, C  18
                           OR
          2x  7 x  4  A x  2  B  x  2  C
            2                     2

x  2
A2                     4 A  B  7           4 A  2 B  C  4
                                8  B  7              8  30  C  4
                                    B  15                      C  18
                         A  2, B  15, C  18
                                 OR
                2x  7 x  4  A x  2  B  x  2  C
                  2                     2

x  2
2  2   7  2   4  C
       2
A2                     4 A  B  7          4 A  2 B  C  4
                                8  B  7             8  30  C  4
                                    B  15                     C  18
                        A  2, B  15, C  18
                                OR
               2x  7 x  4  A x  2  B  x  2  C
                 2                     2

x  2
2  2   7  2   4  C
       2


                     C  18
A2                     4 A  B  7          4 A  2 B  C  4
                                8  B  7             8  30  C  4
                                    B  15                     C  18
                        A  2, B  15, C  18
                                OR
               2x  7 x  4  A x  2  B  x  2  C
                 2                     2

x  2
2  2   7  2   4  C
       2


                     C  18
 x0
A2                     4 A  B  7          4 A  2 B  C  4
                                8  B  7             8  30  C  4
                                    B  15                     C  18
                        A  2, B  15, C  18
                                OR
               2x  7 x  4  A x  2  B  x  2  C
                 2                     2

x  2
2  2   7  2   4  C
       2


                     C  18
 x0
 4  4 A  2 B  C
A2                     4 A  B  7          4 A  2 B  C  4
                                8  B  7             8  30  C  4
                                    B  15                     C  18
                        A  2, B  15, C  18
                                OR
               2x  7 x  4  A x  2  B  x  2  C
                 2                     2

x  2
2  2   7  2   4  C
       2


                     C  18
 x0
 4  4 A  2 B  C
 4 A  2 B  22
   2 A  B  11
A2                     4 A  B  7          4 A  2 B  C  4
                                8  B  7             8  30  C  4
                                    B  15                     C  18
                        A  2, B  15, C  18
                                OR
               2x  7 x  4  A x  2  B  x  2  C
                 2                     2

x  2
2  2   7  2   4  C
       2


                     C  18
 x0
 4  4 A  2 B  C
 4 A  2 B  22
   2 A  B  11
 x 1
A2                     4 A  B  7          4 A  2 B  C  4
                                 8  B  7             8  30  C  4
                                     B  15                     C  18
                         A  2, B  15, C  18
                                 OR
                2x  7 x  4  A x  2  B  x  2  C
                  2                     2

 x  2
 2  2   7  2   4  C
       2


                      C  18
  x0
  4  4 A  2 B  C
  4 A  2 B  22
    2 A  B  11
  x 1
2  7  4  9 A  3B  C
A2                     4 A  B  7          4 A  2 B  C  4
                                 8  B  7             8  30  C  4
                                     B  15                     C  18
                         A  2, B  15, C  18
                                 OR
                2x  7 x  4  A x  2  B  x  2  C
                  2                     2

 x  2
 2  2   7  2   4  C
       2


                      C  18
  x0
  4  4 A  2 B  C
  4 A  2 B  22
    2 A  B  11
  x 1
2  7  4  9 A  3B  C
9 A  3B  27
  3 A  B  9
A2                     4 A  B  7              4 A  2 B  C  4
                                 8  B  7                 8  30  C  4
                                     B  15                         C  18
                         A  2, B  15, C  18
                                 OR
                2x  7 x  4  A x  2  B  x  2  C
                  2                     2

 x  2
 2  2   7  2   4  C
       2                                       2 A  B  11   
                      C  18                   3 A  B  9
  x0
  4  4 A  2 B  C
  4 A  2 B  22
    2 A  B  11
  x 1
2  7  4  9 A  3B  C
9 A  3B  27
  3 A  B  9
A2                     4 A  B  7              4 A  2 B  C  4
                                 8  B  7                 8  30  C  4
                                     B  15                         C  18
                         A  2, B  15, C  18
                                 OR
                2x  7 x  4  A x  2  B  x  2  C
                  2                     2

 x  2
 2  2   7  2   4  C
       2                                       2 A  B  11   
                      C  18                   3 A  B  9
  x0                                           A      2
  4  4 A  2 B  C
  4 A  2 B  22
    2 A  B  11
  x 1
2  7  4  9 A  3B  C
9 A  3B  27
  3 A  B  9
A2                     4 A  B  7             4 A  2 B  C  4
                                 8  B  7                8  30  C  4
                                     B  15                        C  18
                         A  2, B  15, C  18
                                 OR
                2x  7 x  4  A x  2  B  x  2  C
                  2                     2

 x  2
 2  2   7  2   4  C
       2                                       2 A  B  11   
                      C  18                   3 A  B  9
  x0                                           A       2  B  15
  4  4 A  2 B  C
  4 A  2 B  22
    2 A  B  11
  x 1
2  7  4  9 A  3B  C
9 A  3B  27
  3 A  B  9
A2                     4 A  B  7              4 A  2 B  C  4
                                 8  B  7                 8  30  C  4
                                     B  15                         C  18
                         A  2, B  15, C  18
                                 OR
                2x  7 x  4  A x  2  B  x  2  C
                  2                     2

 x  2
 2  2   7  2   4  C
       2                                       2 A  B  11   
                      C  18                   3 A  B  9
  x0                                           A       2  B  15
  4  4 A  2 B  C                            A  2, B  15, C  18
  4 A  2 B  22
    2 A  B  11
  x 1
2  7  4  9 A  3B  C
9 A  3B  27
  3 A  B  9
A2                     4 A  B  7              4 A  2 B  C  4
                                 8  B  7                 8  30  C  4
                                     B  15                         C  18
                         A  2, B  15, C  18
                                 OR
                2x  7 x  4  A x  2  B  x  2  C
                  2                     2

 x  2
 2  2   7  2   4  C
       2                                       2 A  B  11   
                      C  18                   3 A  B  9
  x0                                           A       2  B  15
  4  4 A  2 B  C                            A  2, B  15, C  18
  4 A  2 B  22
    2 A  B  11
  x 1
2  7  4  9 A  3B  C                 Exercise 8I; 1, 4, 5b, 8b, 9bc
9 A  3B  27
  3 A  B  9

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11 x1 t16 05 volumes (2013)
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11 x1 t16 04 areas (2013)
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11 x1 t16 03 indefinite integral (2013)
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11 x1 t16 02 definite integral (2013)
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11X1 T11 08 quadratic identities

  • 2. Quadratic Identities If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2 for more than 2 values of x, then;
  • 3. Quadratic Identities If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2 for more than 2 values of x, then; a1  a2
  • 4. Quadratic Identities If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2 for more than 2 values of x, then; a1  a2 b1  b2
  • 5. Quadratic Identities If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2 for more than 2 values of x, then; a1  a2 b1  b2 c1  c2
  • 6. Quadratic Identities If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2 for more than 2 values of x, then; a1  a2 b1  b2 c1  c2 e.g. Find A, B and C if; 2 x2  7 x  4  A x  2  B  x  2  C 2
  • 7. Quadratic Identities If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2 for more than 2 values of x, then; a1  a2 b1  b2 c1  c2 e.g. Find A, B and C if; 2 x2  7 x  4  A x  2  B  x  2  C 2  A x2  4 x  4  B  x  2  C
  • 8. Quadratic Identities If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2 for more than 2 values of x, then; a1  a2 b1  b2 c1  c2 e.g. Find A, B and C if; 2 x2  7 x  4  A x  2  B  x  2  C 2  A x2  4 x  4  B  x  2  C  Ax 2  4 Ax  4 A  Bx  2 B  C
  • 9. Quadratic Identities If a1 x 2  b1 x  c1  a2 x 2  b2 x  c2 for more than 2 values of x, then; a1  a2 b1  b2 c1  c2 e.g. Find A, B and C if; 2 x2  7 x  4  A x  2  B  x  2  C 2  A x2  4 x  4  B  x  2  C  Ax 2  4 Ax  4 A  Bx  2 B  C  Ax 2   4 A  B  x   4 A  2 B  C 
  • 10. A2
  • 11. A2 4 A  B  7
  • 12. A2 4 A  B  7 8  B  7
  • 13. A2 4 A  B  7 8  B  7 B  15
  • 14. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 B  15
  • 15. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15
  • 16. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18
  • 17. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18
  • 18. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2
  • 19. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2
  • 20. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2
  • 21. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 C  18
  • 22. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 C  18 x0
  • 23. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 C  18 x0 4  4 A  2 B  C
  • 24. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 C  18 x0 4  4 A  2 B  C 4 A  2 B  22 2 A  B  11
  • 25. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 C  18 x0 4  4 A  2 B  C 4 A  2 B  22 2 A  B  11 x 1
  • 26. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 C  18 x0 4  4 A  2 B  C 4 A  2 B  22 2 A  B  11 x 1 2  7  4  9 A  3B  C
  • 27. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 C  18 x0 4  4 A  2 B  C 4 A  2 B  22 2 A  B  11 x 1 2  7  4  9 A  3B  C 9 A  3B  27 3 A  B  9
  • 28. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 2 A  B  11    C  18 3 A  B  9 x0 4  4 A  2 B  C 4 A  2 B  22 2 A  B  11 x 1 2  7  4  9 A  3B  C 9 A  3B  27 3 A  B  9
  • 29. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 2 A  B  11    C  18 3 A  B  9 x0 A 2 4  4 A  2 B  C 4 A  2 B  22 2 A  B  11 x 1 2  7  4  9 A  3B  C 9 A  3B  27 3 A  B  9
  • 30. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 2 A  B  11    C  18 3 A  B  9 x0 A  2  B  15 4  4 A  2 B  C 4 A  2 B  22 2 A  B  11 x 1 2  7  4  9 A  3B  C 9 A  3B  27 3 A  B  9
  • 31. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 2 A  B  11    C  18 3 A  B  9 x0 A  2  B  15 4  4 A  2 B  C  A  2, B  15, C  18 4 A  2 B  22 2 A  B  11 x 1 2  7  4  9 A  3B  C 9 A  3B  27 3 A  B  9
  • 32. A2 4 A  B  7 4 A  2 B  C  4 8  B  7 8  30  C  4 B  15 C  18  A  2, B  15, C  18 OR 2x  7 x  4  A x  2  B  x  2  C 2 2 x  2 2  2   7  2   4  C 2 2 A  B  11    C  18 3 A  B  9 x0 A  2  B  15 4  4 A  2 B  C  A  2, B  15, C  18 4 A  2 B  22 2 A  B  11 x 1 2  7  4  9 A  3B  C Exercise 8I; 1, 4, 5b, 8b, 9bc 9 A  3B  27 3 A  B  9