Using the quadratic formula, which of the following is the solution to the quadratic equation 5x2 + 10x - 5 = 0? x = -1 -√2, x = -1 + √2 x = -1 -√5, x = -1 + √5 x = 1 -√2, x = 1 + √2 x = -1 -√201, x = -1 + √201