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Simplifying
2x2 + -15 = 65
Reorder the terms:
-15 + 2x2 = 65
Solving
-15 + 2x2 = 65
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '15' to each side of the equation.
-15 + 15 + 2x2 = 65 + 15
Combine like terms: -15 + 15 = 0
0 + 2x2 = 65 + 15
2x2 = 65 + 15
Combine like terms: 65 + 15 = 80
2x2 = 80
Divide each side by '2'.
x2 = 40
Simplifying
x2 = 40
Take the square root of each side:
x = {-6.32455532, 6.32455532}
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