Question

Which of the following equations has only one solution?
x2 + 4x + 4 = 0
x2 + x = 0
x2 - 1 = 0

Answer 1

Answer:

Step-by-step explanation:

x^2 + 4x + 4 = (x + 2)^2 is the equation with equal roots -2.

Answer 2

x^2+4x+4=0 has only one solution