The tangent to y=2x3+x2−4xy=2x^3+x^2-4xy=2x3+x2−4x has gradient 12. Find the possible xxx-coordinates of the point of contact.
115 exam-style questions on CCEA A Level Maths 1.6 Differentiation, covering 1.6.1 Differentiation, 1.6.2 Differentiation, 1.6.3 Differentiation, 1.6.4 Differentiation, 1.6.5 Differentiation, 1.6.6 Differentiation, and 1.6.7 Differentiation. Each one has a worked solution and a mark scheme showing where the marks go.