2x^2-81=17

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Solution for 2x^2-81=17 equation: 


Simplifying
2x2 + -81 = 17

Reorder the terms:
-81 + 2x2 = 17

Solving
-81 + 2x2 = 17

Solving for variable 'x'.

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

Add '81' to each side of the equation.
-81 + 81 + 2x2 = 17 + 81

Combine like terms: -81 + 81 = 0
0 + 2x2 = 17 + 81
2x2 = 17 + 81

Combine like terms: 17 + 81 = 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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