3x2 5x 5 0 July 8, 2019 16 32 64 128 3x2 2 √ 5x 5 0 3x2 2 √ 5x 5 0 by quadratic formula 3x2 2 √ 5x 5 0 by factorisation method 3x2 5 5x 10 0 3x2 2 √ 5x 5 0 discriminant