Myra’s tutor used these steps to solve the problem 10x^2=90.
• Divide both sides by 10 to get x^2=9.
• Take square roots on both sides to get x=±3.
Using this method, what is the solution to 7x^2=1008?

±
3

± 3

±
7

A. ± 7
B. ±12
C. ± 12
D. ±144