Foundation November 2018 Paper 2 Q26
26
(a) Expand and simplify \((5x + 2)(2x - 3)\) (2)
(b) Factorise \(x^2 + 4x + 3\) (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(10x^2 - 11x - 6\) | M1 | for 3 out of no more than 4 terms correct with correct signs or 4 correct terms ignoring signs |
| A1 | cao |
Additional guidance
\(10x^2 - 15x + 4x - 6\)
NB: \(10x^2 - 11x\) and \(-11x - 6\) are indicative of 3 correct terms.
| Answer | Mark | Mark scheme |
|---|---|---|
| \((x + 1)(x + 3)\) | M1 | for \((x \pm 1)(x \pm 3)\) or for \((x + a)(x + b)\) where either \(ab = 3\) or \(a + b = 4\) |
| A1 | cao |