121+81=x2

Rewrite the equation as x2=121+81.

x2=121+81

Take the square root of both sides of the equation to eliminate the exponent on the left side.

x=±121+81

Add 121 and 81.

x=±202

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=202

Next, use the negative value of the ± to find the second solution.

x=-202

The complete solution is the result of both the positive and negative portions of the solution.

x=202,-202

x=202,-202

x=202,-202

The result can be shown in multiple forms.

Exact Form:

x=202,-202

Decimal Form:

x=14.21267040…,-14.21267040…

Solve Using the Square Root Property 121+81=x^2