solve for x by completing the square x^2 + 4x - 12
(x+2)2 -16 = 0 (x+2)2 = 16 x+2 = -4 or +4 x = 2 or -6
ER
Related Maths GCSE answers
All answers ▸If one shop has melons for sale on a buy one get one free offer at £2 a melon with each melon weighing 2kg, and a second shop offering melons at 30p per kilogram. Which shop is the best value for money?
x^2 +y^2 =25, y – 3x = 13 - Simultaneous Equations (June 2017)
If 3(x+2) = 4, what is x?
Can you run through the quadratic equation(including the sketch and algebra).