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# Revision algebra 1

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revision on indices, common factors, equations and simultaneous equations

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### Revision algebra 1

1. 1. ALGEBRA By the end of the lesson you will be able to: • Revise rules of indices. • Multiply two brackets. •   Use the formula to expand the square of a binomial. • Factorise expressions by using common factor or grouping terms. • Simplify algebraic fractions. • Factorise expressions by using difference of two perfect  squares .
2. 2. Write without using brackets:
3. 3. 2 x ( x ­ 5 )  ­ ( x + 5 )=
4. 4. (x + 2y)(x ­ 6y) ­ (x ­ y)(x ­ 3y) =                             Expand:
5. 5. Factorise:
6. 6. Factorise:
7. 7. Factorise:
8. 8. Simplify:
9. 9. Simplify:
10. 10. Make x the subject of the formula:
11. 11. Make r the subject of the formula:
12. 12. Solve the equation:
13. 13. Solve the equation:
14. 14. Solve the equation:
15. 15. Solve by substitution:
16. 16. Solve by elimination method:
17. 17. Solve :
18. 18. Factorise the expression: a ( 2 + x ) + b ( 2 + x) =
19. 19. Factorise the expression: 2 a + a x + 2 b + b x =
20. 20. Factorise the expression: 3 x ­ 3 y + ax ­ a y =
21. 21. ( x ­ 5 ) ( x + a ) =  x2  + x a ­ 5 x ­ 5 a Expand Factorise
22. 22. a x + b x + ay + by = Factorise:
23. 23. xy +mx + 3y +3 m = Factorise:
24. 24. t2  ­ 3 ta + t ­  3a=
25. 25. Attachments Difference of 2 Squares ﴾Geometric Demo﴿.ppt 5 Common factor & grouping.doc