a x 5 30 26 Solve the quadratic equations by completing the square Round to the nearest hundredth if necessary a x 6x 40 b x 2x 1 0 27 Solve the quadratic equations by using the Quadratic Formula Round to the nearest hundredth if necessary a x 2x 15 0 b 2x x 8 0 c 5x 10x 5 28 Use the discriminant to determine the number of real solutions a x 4x 4 0 b x 14 14 Discriminant b 6x 2x 1 Discriminant c x 7x 1 Discriminant