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Simplifying
2x2 + 3 = 84
Reorder the terms:
3 + 2x2 = 84
Solving
3 + 2x2 = 84
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 = 84 + -3
Combine like terms: 3 + -3 = 0
0 + 2x2 = 84 + -3
2x2 = 84 + -3
Combine like terms: 84 + -3 = 81
2x2 = 81
Divide each side by '2'.
x2 = 40.5
Simplifying
x2 = 40.5
Take the square root of each side:
x = {-6.363961031, 6.363961031}
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