Higher November 2017 Paper 3 Q13

EdexcelCurrent spec2 marksCompleting the Square

13 Write \(x^2 + 6x - 7\) in the form \((x + a)^2 + b\) where \(a\) and \(b\) are integers. (2)

Answer	Mark	Notes
\((x + 3)^2 - 16\)	M1	for \((x + 3)^2\) or \((x^2 + 6x - 7 =)\ x^2 + 2ax + a^2 + b\)
\((x + 3)^2 - 16\)	A1	cao