The equation kx2+6kx+2=0kx^2 + 6kx + 2 = 0kx2+6kx+2=0, where k k\,k is a constant, has no real roots.
Find the set of possible values for kkk.
9 exam-style questions on Edexcel AS Level Maths 2.4 The Discriminant. Each one has a worked solution and a mark scheme showing where the marks go.