solve. x^2-81=0

Answer 1

To solve for x in the equation x^2 - 81 = 0, we need to first add 81 to both sides to isolate x^2:

x^2 = 81

Next, we take the square root of both sides to solve for x:

x = ±√81

x = ±9

Therefore, the solutions to the equation x^2 - 81 = 0 are x = 9 and x = -9.