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Simplifying
x2 + -2 + -2 = 0
Reorder the terms:
-2 + -2 + x2 = 0
Combine like terms: -2 + -2 = -4
-4 + x2 = 0
Solving
-4 + x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '4' to each side of the equation.
-4 + 4 + x2 = 0 + 4
Combine like terms: -4 + 4 = 0
0 + x2 = 0 + 4
x2 = 0 + 4
Combine like terms: 0 + 4 = 4
x2 = 4
Simplifying
x2 = 4
Take the square root of each side:
x = {-2, 2}
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