Solve for c 9^2+12^2=c^2

Math
92+122=c2
Rewrite the equation as c2=92+122.
c2=92+122
Take the square root of both sides of the equation to eliminate the exponent on the left side.
c=±92+122
The complete solution is the result of both the positive and negative portions of the solution.
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Simplify the right side of the equation.
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Raise 9 to the power of 2.
c=±81+122
Raise 12 to the power of 2.
c=±81+144
Add 81 and 144.
c=±225
Rewrite 225 as 152.
c=±152
Pull terms out from under the radical, assuming positive real numbers.
c=±15
c=±15
The complete solution is the result of both the positive and negative portions of the solution.
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First, use the positive value of the ± to find the first solution.
c=15
Next, use the negative value of the ± to find the second solution.
c=-15
The complete solution is the result of both the positive and negative portions of the solution.
c=15,-15
c=15,-15
c=15,-15
Solve for c 9^2+12^2=c^2

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