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Quadratic Equations.
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| Submitted: Thu Oct 16 2003
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GCSE Maths Coursework Quadratic Equations By Joe Gill Introduction There are several ways of solving Quadratic equations. These are FACTORISING THE QUADRATIC FORMULA COMPLETING THE SQUARE TRIAL & IMPROVEMENT Here is an example of how to solve a quadratic equation using factorising:- Factorising a quadratic means putting the equation into two brackets. The standard format for quadratics is ax² + bx +c = 0. How to Answer a Quadratic Equation by factorising Solve x2-x+12=0 by factorising 1. Firstly rearrange it x²-x=12 2. a=1 so the initial brackets are :- (x ) (x ) 3. We now want to look at all the pairs of numbers that multiply to give c (=12), but which also add or subtract to give the value of b: 1 x 12 gives: 13 or 11 2 x 6 give: 8 or 4 3 x 4 give 7 or 1 (this is the value of b) 4. So 3 & 4 will give b + or - 1, so put them in the...
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