AS PURE MATHS REVISION NOTES
www.mathsbox.org.uk 3 QUADRATIC EQUATIONS AND GRAPHS Factorising identifying the roots of the equation ax2 + bc + c = 0 • Look out for the difference of 2 squares x2 – a2= (x - a)(x + a) • Look out for the perfect square x2 + 2ax + a2 = (x + a)2 or x2 – 2ax + a2 = (x -a)2 • Look out for equations which can be transformed into quadratic equations
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