Question

Which of the following equations have only one solution? Select all correct answers. 4x 2 + 4x = 0 x 2 + 6x + 9 = 0 9x 2 - 25 = 0 5x 2 + 20x + 20 = 0 x 2 - x - 6 = 0

Answer 1

Summary: The equation x2 + 4x + 4 = 0 has only one solution x = -2.