-2x^2 + 3x - 9 = 0 The quadratic is not factorable so quadratic formula must be used. x = (-b + - √(b^2 - 4ac))/2a a = -2, b = 3, c = -9 x = (-3 + - √(9 - 4*-2*-9))/-4 x = (-3 + - √(-63))/-4 x = -3 + - 3i√7 -------------- -4 x = 3 + 3i√7 x = 3 - 3i√7 ------------ ------------ 4 4
