3x^2-12=-9

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


Simplifying
3x2 + -12 = -9

Reorder the terms:
-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 = 3
3x2 = 3

Divide each side by '3'.
x2 = 1

Simplifying
x2 = 1

Take the square root of each side:
x = {-1, 1}

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