# quadratic equations notes

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- Created by: louisepardoe
- Created on: 14-06-16 18:49

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**factorising quadratics**

factorising a quadratic

- means put into two brackets
- (ax squared) + bx + c = 0

factorising method when a = 1

- always rearrange into the standard format
- write down the two brackets with the x's in (x )(x ) = 0
- find 2 numbers that multiply to give c but also add/subtract to give b
- fill in the +/- signs
- expand the brackets to make sure they give the original equation
- solve the euqation by setting each bracket equal to 0

when a is not 1

- rearrange into the standard format
- write down the initial brackets…

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