Question

Solve for x.

5x to the second power -80=0

A. {16}
B. {4}
C. {4 , -4}
D. {16 , -16}

Answer 1

5x^2 - 80 = 0
5x^2 = 80
x^2 = 80/5
x^2 = 16
x = sqrt 16
x = (4,-4) <===