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Simplifying
-225 = -1x2
Solving
-225 = -1x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add 'x2' to each side of the equation.
-225 + x2 = -1x2 + x2
Combine like terms: -1x2 + x2 = 0
-225 + x2 = 0
Add '225' to each side of the equation.
-225 + 225 + x2 = 0 + 225
Combine like terms: -225 + 225 = 0
0 + x2 = 0 + 225
x2 = 0 + 225
Combine like terms: 0 + 225 = 225
x2 = 225
Simplifying
x2 = 225
Take the square root of each side:
x = {-15, 15}
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