9x^2-12=13

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Solution for 9x^2-12=13 equation: 


Simplifying
9x2 + -12 = 13

Reorder the terms:
-12 + 9x2 = 13

Solving
-12 + 9x2 = 13

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 + 9x2 = 13 + 12

Combine like terms: -12 + 12 = 0
0 + 9x2 = 13 + 12
9x2 = 13 + 12

Combine like terms: 13 + 12 = 25
9x2 = 25

Divide each side by '9'.
x2 = 2.777777778

Simplifying
x2 = 2.777777778

Take the square root of each side:
x = {-1.666666667, 1.666666667}

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