Verify that the solutions of x2+6x−11=0x^2 + 6x - 11 = 0x2+6x−11=0 are −3±25-3 \pm 2\sqrt{5}−3±25.
156 exam-style questions on Eduqas GCSE Maths Quadratic Formula. Each one has a worked solution and a mark scheme showing where the marks go.