4MA0 Foundation June 2014 Paper 2 Q23

EdexcelFoundationOld spec5 marksExpanding Brackets Solving Simple Equations

(a) Solve \(\;7x - 6 = 2x + 17\)
Show clear algebraic working. (3)

(b) Expand and simplify fully \(\;(x + 8)(x + 2)\) (2)

Mark scheme (a)

Scheme	Marks
\(5x = 17 + 6\) \(7x - 2x = 23\)	M2
\(4\frac{3}{5}\) oe	A1
	(3)

Notes

M2: for correct rearrangement with \(x\) terms on one side and numbers on the other AND collection of terms on at least one side
or for \(5x - 23 = 0\) or \(23 - 5x = 0\)
M1 for \(7x - 2x = 17 + 6\) oe
ie correct rearrangement with \(x\) terms on one side and numbers on the other
or \(5x - 6 = 17\) or \(7x = 2x + 23\)

A1: Award full marks for a correct answer if at least 1 method mark awarded

Scheme	Marks
\(x^2 + 2x + 8x + 16\) Answer: \(x^2 + 10x + 16\)	B2
	(2)
	(5 marks)