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Simplifying
-2x2 + 30 = 18
Reorder the terms:
30 + -2x2 = 18
Solving
30 + -2x2 = 18
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-30' to each side of the equation.
30 + -30 + -2x2 = 18 + -30
Combine like terms: 30 + -30 = 0
0 + -2x2 = 18 + -30
-2x2 = 18 + -30
Combine like terms: 18 + -30 = -12
-2x2 = -12
Divide each side by '-2'.
x2 = 6
Simplifying
x2 = 6
Take the square root of each side:
x = {-2.449489743, 2.449489743}
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