2x^2-9=15

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Solution for 2x^2-9=15 equation: 


Simplifying
2x2 + -9 = 15

Reorder the terms:
-9 + 2x2 = 15

Solving
-9 + 2x2 = 15

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 2x2 = 15 + 9

Combine like terms: -9 + 9 = 0
0 + 2x2 = 15 + 9
2x2 = 15 + 9

Combine like terms: 15 + 9 = 24
2x2 = 24

Divide each side by '2'.
x2 = 12

Simplifying
x2 = 12

Take the square root of each side:
x = {-3.464101615, 3.464101615}

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