Question 3 - A-Level Maths

3 A curve has equation \(y = 2 x ^ { 2 } - 6 x + 5\).

Find the set of values of \(x\) for which \(y > 13\).
Find the value of the constant \(k\) for which the line \(y = 2 x + k\) is a tangent to the curve.