3x^2-9=36

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Solution for 3x^2-9=36 equation:


Simplifying
3x2 + -9 = 36

Reorder the terms:
-9 + 3x2 = 36

Solving
-9 + 3x2 = 36

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 3x2 = 36 + 9

Combine like terms: -9 + 9 = 0
0 + 3x2 = 36 + 9
3x2 = 36 + 9

Combine like terms: 36 + 9 = 45
3x2 = 45

Divide each side by '3'.
x2 = 15

Simplifying
x2 = 15

Take the square root of each side:
x = {-3.872983346, 3.872983346}

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