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Simplifying
3x2 + -27 = 9
Reorder the terms:
-27 + 3x2 = 9
Solving
-27 + 3x2 = 9
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '27' to each side of the equation.
-27 + 27 + 3x2 = 9 + 27
Combine like terms: -27 + 27 = 0
0 + 3x2 = 9 + 27
3x2 = 9 + 27
Combine like terms: 9 + 27 = 36
3x2 = 36
Divide each side by '3'.
x2 = 12
Simplifying
x2 = 12
Take the square root of each side:
x = {-3.464101615, 3.464101615}
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