Maths Maths revision Cards 1.5 / 5 based on 2 ratings ? MathematicsQuadratic equationsGCSE Created by: Thomas LingCreated on: 17-05-10 19:23 Quadratic Equations QUADRATIC FORMULA: ax"+bx+c=0 SOLVING e.g: 1 of 3 Completing the Square Completing the square: Rewrite x2 + 6x as a square plus another term. The coefficient of x is 6. Dividing 6 by 2 and squaring it gives 9. x2 + 6x = (x2 + 6x + 9) - 9 = (x + 3)2 - 9 2 of 3 The Nth Term The Nth Term: An=b A=The difference between terms B= Difference between The first term of the sequence and A E.g 4,7,10,13,16... A=3, B= 3-4=1, so Nth term= 3n+1 3 of 3
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