3x^2+12=87

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Solution for 3x^2+12=87 equation: 


Simplifying
3x2 + 12 = 87

Reorder the terms:
12 + 3x2 = 87

Solving
12 + 3x2 = 87

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 = 87 + -12

Combine like terms: 12 + -12 = 0
0 + 3x2 = 87 + -12
3x2 = 87 + -12

Combine like terms: 87 + -12 = 75
3x2 = 75

Divide each side by '3'.
x2 = 25

Simplifying
x2 = 25

Take the square root of each side:
x = {-5, 5}

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