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Factorising quadratic expressions

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Presentation on theme: "Factorising quadratic expressions"— Presentation transcript:

1 Factorising quadratic expressions

2 Factorise these quadratic expressions
Hint - attention to detail is critical x2 + 6x + 5 2x2 - 9x - 5 x2 + 4x - 5 2x2 + 11x + 5 2x2 + 9x - 5 2x2 - 3x - 5 2x2 + 3x - 5 2x2 -11x + 5 2x2 - 7x + 5 2x2 + 7x + 5 x2 - 6x + 5 x2 - 4x - 5

3 Activity cards x2 + 6x + 5 2x2 - 9x - 5 2x2 -11x + 5 2x2 + 11x + 5
Cut out the cards and investigate the relationship between the factors x2 + 6x + 5 2x2 - 9x - 5 2x2 -11x + 5 2x2 + 11x + 5 2x2 - 3x - 5 2x2 + 3x - 5 2x2 + 7x + 5 2x2 - 7x + 5 2x2 + 9x - 5 x2 + 4x - 5 x2 - 4x - 5 x2 - 6x + 5 You may wish to print the slide 1 per page and cut out the cards

4 Hint cards Use these cards to help factorise the quadratic expressions
These are the factors, which may help students who find this topic challenging

5 Attention to detail is essential for success
Solution (x + 5) (x - 5) (2x + 5) (2x - 5) (x + 1) 2x2 - 3x - 5 x2 + 6x + 5 x2 - 4x - 5 2x2 + 7x + 5 (x - 1) x2 + 4x - 5 x2 - 6x + 5 2x2 + 3x - 5 2x2 - 7x + 5 Attention to detail is essential for success (2x + 1) 2x2 + 11x + 5 2x2 - 9x - 5 (2x - 1) 2x2 + 9x - 5 2x2 -11x + 5


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