Respuesta :
Answer:
x=±2
Step-by-step explanation:
x^2-4=0
Add 4 to each side
x^2-4+4=0+4
x^2 = 4
Take the square root of each side
sqrt(x^2) = sqrt(4)
x=±2
Answer:
x=±2
Step-by-step explanation:
x^2-4=0
Add 4 to each side
x^2-4+4=0+4
x^2 = 4
Take the square root of each side
sqrt(x^2) = sqrt(4)
x=±2