Question

I need help with this problem not understanding it. Give exact and approximate solutions to three decimal places. x^2+6x+9= 81 what are the exact solutions? x=___ There are no approximate solutions since the solutions are integers.

Answer 1

x^2 + 6 x - 72 = 0
(x-6)(x+12) = 0
x = 6 or x = -12