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Simplifying
-441 = (-2x2) + 9
Reorder the terms:
-441 = 9 + (-2x2)
Solving
-441 = 9 + (-2x2)
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '(2x2)' to each side of the equation.
-441 + (2x2) = 9 + (-2x2) + (2x2)
Combine like terms: (-2x2) + (2x2) = 0
-441 + (2x2) = 9 + 0
-441 + (2x2) = 9
Add '441' to each side of the equation.
-441 + 441 + (2x2) = 9 + 441
Combine like terms: -441 + 441 = 0
0 + (2x2) = 9 + 441
(2x2) = 9 + 441
Combine like terms: 9 + 441 = 450
(2x2) = 450
Divide each side by '2'.
x2 = 225
Simplifying
x2 = 225
Take the square root of each side:
x = {-15, 15}
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