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Simplifying
3x2 + -20 = 90
Reorder the terms:
-20 + 3x2 = 90
Solving
-20 + 3x2 = 90
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '20' to each side of the equation.
-20 + 20 + 3x2 = 90 + 20
Combine like terms: -20 + 20 = 0
0 + 3x2 = 90 + 20
3x2 = 90 + 20
Combine like terms: 90 + 20 = 110
3x2 = 110
Divide each side by '3'.
x2 = 36.66666667
Simplifying
x2 = 36.66666667
Take the square root of each side:
x = {-6.055300708, 6.055300708}
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