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Simplifying
x2 + -441 = 18
Reorder the terms:
-441 + x2 = 18
Solving
-441 + x2 = 18
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '441' to each side of the equation.
-441 + 441 + x2 = 18 + 441
Combine like terms: -441 + 441 = 0
0 + x2 = 18 + 441
x2 = 18 + 441
Combine like terms: 18 + 441 = 459
x2 = 459
Simplifying
x2 = 459
Take the square root of each side:
x = {-21.424285286, 21.424285286}
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