m^2-21=66

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Solution for m^2-21=66 equation: 


Simplifying
m2 + -21 = 66

Reorder the terms:
-21 + m2 = 66

Solving
-21 + m2 = 66

Solving for variable 'm'.

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

Add '21' to each side of the equation.
-21 + 21 + m2 = 66 + 21

Combine like terms: -21 + 21 = 0
0 + m2 = 66 + 21
m2 = 66 + 21

Combine like terms: 66 + 21 = 87
m2 = 87

Simplifying
m2 = 87

Take the square root of each side:
m = {-9.327379053, 9.327379053}

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