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Simplifying
0 = 3x2 + -216
Reorder the terms:
0 = -216 + 3x2
Solving
0 = -216 + 3x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-3x2' to each side of the equation.
0 + -3x2 = -216 + 3x2 + -3x2
Remove the zero:
-3x2 = -216 + 3x2 + -3x2
Combine like terms: 3x2 + -3x2 = 0
-3x2 = -216 + 0
-3x2 = -216
Divide each side by '-3'.
x2 = 72
Simplifying
x2 = 72
Take the square root of each side:
x = {-8.485281374, 8.485281374}
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