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Simplifying
4x2 + 5 + -3x2 = 86
Reorder the terms:
5 + 4x2 + -3x2 = 86
Combine like terms: 4x2 + -3x2 = 1x2
5 + 1x2 = 86
Solving
5 + 1x2 = 86
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-5' to each side of the equation.
5 + -5 + 1x2 = 86 + -5
Combine like terms: 5 + -5 = 0
0 + 1x2 = 86 + -5
1x2 = 86 + -5
Combine like terms: 86 + -5 = 81
1x2 = 81
Divide each side by '1'.
x2 = 81
Simplifying
x2 = 81
Take the square root of each side:
x = {-9, 9}
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