The equation (k+5)x2+4x+(k+2)=0(k + 5)x^2 + 4x + (k + 2) = 0(k+5)x2+4x+(k+2)=0 where k k\,k is a constant, has two distinct real solutions for xxx.
Find the set of possible values for kkk.
63 exam-style questions on AQA A Level Maths 1.5.3 Quadratic functions. Each one has a worked solution and a mark scheme showing where the marks go.