-81+c^2=

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Solution for -81+c^2= equation:


Simplifying
-81 + c2 = 0

Solving
-81 + c2 = 0

Solving for variable 'c'.

Move all terms containing c to the left, all other terms to the right.

Add '81' to each side of the equation.
-81 + 81 + c2 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + c2 = 0 + 81
c2 = 0 + 81

Combine like terms: 0 + 81 = 81
c2 = 81

Simplifying
c2 = 81

Take the square root of each side:
c = {-9, 9}

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