3x^2-1=11

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Solution for 3x^2-1=11 equation: 


Simplifying
3x2 + -1 = 11

Reorder the terms:
-1 + 3x2 = 11

Solving
-1 + 3x2 = 11

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 3x2 = 11 + 1

Combine like terms: -1 + 1 = 0
0 + 3x2 = 11 + 1
3x2 = 11 + 1

Combine like terms: 11 + 1 = 12
3x2 = 12

Divide each side by '3'.
x2 = 4

Simplifying
x2 = 4

Take the square root of each side:
x = {-2, 2}

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