3x^2+2=21

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Solution for 3x^2+2=21 equation: 


Simplifying
3x2 + 2 = 21

Reorder the terms:
2 + 3x2 = 21

Solving
2 + 3x2 = 21

Solving for variable 'x'.

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

Add '-2' to each side of the equation.
2 + -2 + 3x2 = 21 + -2

Combine like terms: 2 + -2 = 0
0 + 3x2 = 21 + -2
3x2 = 21 + -2

Combine like terms: 21 + -2 = 19
3x2 = 19

Divide each side by '3'.
x2 = 6.333333333

Simplifying
x2 = 6.333333333

Take the square root of each side:
x = {-2.516611478, 2.516611478}

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