Maths quadratic formula
- Created by: GTC1828
- Created on: 30-07-19 10:57
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- Quadratic formula
- General form
- y=ax^2
- examples
- solving by factorising
- e.g. 1: x^2-2x-15=0 (x+3)(x-5)=0. x=-3 or 5
- e.g. 2: 2x^2+14+24=0. 2(x^2+7x+12)=0. x^2=7x=12=0(x+3)(x+4)=0 x=-3 or -4
- solving by factorising
- General form
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