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Simplifying
-3x2 + 27 = 0
Reorder the terms:
27 + -3x2 = 0
Solving
27 + -3x2 = 0
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 = 0 + -27
Combine like terms: 27 + -27 = 0
0 + -3x2 = 0 + -27
-3x2 = 0 + -27
Combine like terms: 0 + -27 = -27
-3x2 = -27
Divide each side by '-3'.
x2 = 9
Simplifying
x2 = 9
Take the square root of each side:
x = {-3, 3}
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