The equation (k+8)x2+0x+(k+1)=0(k + 8)x^2 + 0x + (k + 1) = 0(k+8)x2+0x+(k+1)=0, where k k\,k is a constant, has two distinct real solutions for xxx.
Find the set of possible values for kkk.
49 exam-style questions on Edexcel A Level Maths 2.4 The Discriminant. Each one has a worked solution and a mark scheme showing where the marks go.