Question

What are the solutions to the quadratic equation 4x^2 = 64?

A. x = −16 and x = 16
B. x = −8 and x = 8
C. x = −4 and x = 4
D. x = −2 and x = 2

Answer 1

C

Explanation:

Given

4x² = 64 ( divide both sides by 4 )

x² = 16 ( take the square root of both sides )

x = ±
`√(16)` = ± 4

Solutions are x = - 4 and x = 4 → C