3+3x^2=15

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Solution for 3+3x^2=15 equation: 


Simplifying
3 + 3x2 = 15

Solving
3 + 3x2 = 15

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 3x2 = 15 + -3

Combine like terms: 3 + -3 = 0
0 + 3x2 = 15 + -3
3x2 = 15 + -3

Combine like terms: 15 + -3 = 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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