1MA0 Higher June 2016 Paper 1 Q22
22 Solve \(x^2 = 4(x - 3)^2\) (3)
| Answer | Mark | Notes |
|---|---|---|
| 2, 6 | 3 | M1 for \((x^2 =)\ 4(x^2 - 6x + 9)\) or \(4x^2 - 24x + 36\) oe or for \(\dfrac{x^2}{4} = x^2 - 6x + 9\) M1 (dep) for \(3x^2 - 24x + 36 = 0\) or \(3(x^2 - 8x + 12) = 0\) or \((x - 2)(x - 6) = 0\) or \((3x - 6)(x - 6) = 0\) oe A1 cao OR M1 for \(x = (\pm)2(x - 3)\) or \(\dfrac{x}{2} = (\pm)(x - 3)\) M1(dep) for correct solution of one equation A1 cao |