Rewrite v+72 as v+7.
Use axn=axn to rewrite v+7 as (v+7)12.
Apply the power rule and multiply exponents, (am)n=amn.
Combine 12 and 2.
Cancel the common factor of 2.
Cancel the common factor.
Divide 1 by 1.
Raise 3 to the power of 2.
Move all terms not containing v to the right side of the equation.
Subtract 7 from both sides of the equation.
Subtract 7 from 9.
Solve for v ( square root of v+7)^2=3^2