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Simplifying
2m2 + -21 = -3
Reorder the terms:
-21 + 2m2 = -3
Solving
-21 + 2m2 = -3
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 + 2m2 = -3 + 21
Combine like terms: -21 + 21 = 0
0 + 2m2 = -3 + 21
2m2 = -3 + 21
Combine like terms: -3 + 21 = 18
2m2 = 18
Divide each side by '2'.
m2 = 9
Simplifying
m2 = 9
Take the square root of each side:
m = {-3, 3}
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