Higher November 2019 Paper 2 Q15
15 Expand and simplify \((3x + 2)(2x + 1)(x - 5)\) (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(6x^3 - 23x^2 - 33x - 10\) | M1 | for method to find the product of any two linear expressions (3 out of no more than 4 terms correct with correct signs or 4 correct terms ignoring signs) |
| M1 | for method of multiplying out remaining products, half of which are correct (ft their first product) | |
| A1 | cao |
Additional guidance
Note that, for example, \(6x^2 + 7x\) or \(7x + 2\) are regarded as three terms in the expansion of \((3x + 2)(2x + 1)\)
First product must be quadratic but need not be simplified or may be simplified incorrectly