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Simplifying
2x2 + -18 = 8
Reorder the terms:
-18 + 2x2 = 8
Solving
-18 + 2x2 = 8
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '18' to each side of the equation.
-18 + 18 + 2x2 = 8 + 18
Combine like terms: -18 + 18 = 0
0 + 2x2 = 8 + 18
2x2 = 8 + 18
Combine like terms: 8 + 18 = 26
2x2 = 26
Divide each side by '2'.
x2 = 13
Simplifying
x2 = 13
Take the square root of each side:
x = {-3.605551275, 3.605551275}
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