Answer:
x=3, -3
Step-by-step explanation:
Divide each term in 7x^2=63 by 7 and simplify.
x^2=9
Take the specified root of both sides of the equation to eliminate the exponent on the left side.
x=±√9
Simplify ±√9.
x=±3
The complete solution is the result of both the positive and negative portions of the solution.
