# Solve for x 9x^2=81 9×2=81
Divide each term by 9 and simplify.
Divide each term in 9×2=81 by 9.
9×29=819
Cancel the common factor of 9.
Cancel the common factor.
9×29=819
Divide x2 by 1.
x2=819
x2=819
Divide 81 by 9.
x2=9
x2=9
Take the square root of both sides of the equation to eliminate the exponent on the left side.
x=±9
The complete solution is the result of both the positive and negative portions of the solution.
Simplify the right side of the equation.
Rewrite 9 as 32.
x=±32
Pull terms out from under the radical, assuming positive real numbers.
x=±3
x=±3
The complete solution is the result of both the positive and negative portions of the solution.
First, use the positive value of the ± to find the first solution.
x=3
Next, use the negative value of the ± to find the second solution.
x=-3
The complete solution is the result of both the positive and negative portions of the solution.
x=3,-3
x=3,-3
x=3,-3
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