math
posted by Anonymousab .
how do you solve this can you do this with the steps do I an understand them,please.
(x9)^2=81

The way it sits, both sides are a perfect square, so yo simply take the square root of both sides.
(x9) = ± 9
x = 9 ± 9
x = 0 or x = 18
or
you could expand it ....
x^2  18x + 81 = 81
x^2  18x = 0
x(x  18) = 0
x = 0 or x = 18