Question 130935
Solve.

sqrt( 9x + 81 ) = x + 5

The solution is x = ___7, x=8______

HERE'S HOW:
square both sides of the equation to get - 9x+81=x^2+10x+25

Next simplify: x^2-x-56=0

Next factor: (x-8)(x-7)=0

x=8, x=7