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
14. A2 4 A B 7 4 A 2 B C 4
8 B 7
B 15
15. A2 4 A B 7 4 A 2 B C 4
8 B 7 8 30 C 4
B 15
16. A2 4 A B 7 4 A 2 B C 4
8 B 7 8 30 C 4
B 15 C 18
17. A2 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. A2 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. A2 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. A2 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. A2 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. A2 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
x0
23. A2 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
x0
4 4 A 2 B C
24. A2 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
x0
4 4 A 2 B C
4 A 2 B 22
2 A B 11
25. A2 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
x0
4 4 A 2 B C
4 A 2 B 22
2 A B 11
x 1
26. A2 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
x0
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. A2 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
x0
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. A2 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
x0
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. A2 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
x0 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. A2 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
x0 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. A2 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
x0 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. A2 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
x0 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