4MA0 Higher January 2012 Paper 4 Q15

EdexcelHigherOld spec2 marksQuadratic Inequalities

15 Solve the inequality \(x^2 \lt 16\)

(2)

Mark scheme

Scheme	Marks
\(-4 \lt x \lt 4\)	B2
	(Total 2 marks)

Notes

B2: B1 for \(x \lt 4\) or \(x \gt -4\) or \(x \lt \pm 4\) or \(x \lt \sqrt{16}\)

SC B1 for \(-4 \leqslant x \leqslant 4\)

Apart from Questions 3, 13(b) and 17(f) (where the mark scheme states otherwise), the correct answer, unless clearly obtained by an incorrect method, should be taken to imply a correct method.