12-3x^2=-9

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Solution for 12-3x^2=-9 equation: 


Simplifying
12 + -3x2 = -9

Solving
12 + -3x2 = -9

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-12' to each side of the equation.
12 + -12 + -3x2 = -9 + -12

Combine like terms: 12 + -12 = 0
0 + -3x2 = -9 + -12
-3x2 = -9 + -12

Combine like terms: -9 + -12 = -21
-3x2 = -21

Divide each side by '-3'.
x2 = 7

Simplifying
x2 = 7

Take the square root of each side:
x = {-2.645751311, 2.645751311}

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