2x^2-80=18

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Solution for 2x^2-80=18 equation: 


Simplifying
2x2 + -80 = 18

Reorder the terms:
-80 + 2x2 = 18

Solving
-80 + 2x2 = 18

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '80' to each side of the equation.
-80 + 80 + 2x2 = 18 + 80

Combine like terms: -80 + 80 = 0
0 + 2x2 = 18 + 80
2x2 = 18 + 80

Combine like terms: 18 + 80 = 98
2x2 = 98

Divide each side by '2'.
x2 = 49

Simplifying
x2 = 49

Take the square root of each side:
x = {-7, 7}

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