Solve: 5x^2 + 25x = 0.
x = 0, x = 5
x = 0, x = −5
x = −5, x = 0, x = 5
x = 5, x = 25
x = 0, x = 5
x = 0, x = −5
x = −5, x = 0, x = 5
x = 5, x = 25