4MA0 Higher June 2016 Paper 4R Q16
16 Solve \(2x^2 - 6x + 3 = 0\)
Give your solutions correct to 3 significant figures.
Show your working clearly.
(3)
| Scheme | Marks |
|---|---|
| (\(x\) =) \(\dfrac{--6 \pm \sqrt{(-6)^2 - 4 \times 2 \times 3}}{2 \times 2}\) | M1 |
| (\(x\) =) \(\dfrac{6 \pm \sqrt{12}}{4}\) | M1 |
| 0.634 & 2.37 | A1 |
| (3) |
Notes
M1: condone one sign error, brackets not necessary. Some simplification may already be done – if so this must be correct. (accept \(6^2\) for \((-6)^2\))
A1: answers rounding to 2.37 & 0.634
dep on M1