Algebra 1 factorisation by grouping

1. Common factor Revision from previous lesson http://www.mymaths.co.uk/gold/factorising/factoriseExpressions.html steps 1479 1

2. Algebra By the end of the lesson you should be able to : • Multiply two brackets. • Factorise expressions by grouping. 2

3. Multiplying two brackets (x + y) ( 2 + a ) = 3

4. Expand the brackets: ( x + 3 ) ( x 5 ) = 4

5. Expand the brackets: ( x 5 ) ( x 4 ) = 5

6. Expand the brackets: ( 2x 1 ) ( 3x 2 ) = 6

7. Expand the brackets: 7

8. Expand the brackets: 8

9. Factorise the expression: a ( 2 + x ) + b ( 2 + x) = 9

10. Factorise: 2 a + a x + 2 b + b x = 10

11. Factorise: 3 (x y )+ a ( x y )= 11

12. Factorise: 3 x 3 y + ax a y = 12

13. Expand the brackets: Expand ( x 5 ) ( x + a ) = x2 + x a 5 x 5 a Factorise 13

14. Factorise: a x + b x + ay + by = 14

15. Factorise: xy +mx + 3y +3 m = 15

16. Factorise: 2 t 3 ta + t 3a= Solve worksheet "Factorisation by grouping in pairs" 16

17. 2 a + a ab b = 17

18. 2 3x + 6x ab 2ab = 18

19. 2 5y 2y 5ay + 2a = 19

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