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Simplifying
2x2 + 3 = 15
Reorder the terms:
3 + 2x2 = 15
Solving
3 + 2x2 = 15
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-3' to each side of the equation.
3 + -3 + 2x2 = 15 + -3
Combine like terms: 3 + -3 = 0
0 + 2x2 = 15 + -3
2x2 = 15 + -3
Combine like terms: 15 + -3 = 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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