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
Accepted Solution
A:
The equations which have only one solution are: x²+6x+9=0 and 5x²+20x+20=0,