3x^2+21=9

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Solution for 3x^2+21=9 equation:


Simplifying
3x2 + 21 = 9

Reorder the terms:
21 + 3x2 = 9

Solving
21 + 3x2 = 9

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 3x2 = 9 + -21

Combine like terms: 21 + -21 = 0
0 + 3x2 = 9 + -21
3x2 = 9 + -21

Combine like terms: 9 + -21 = -12
3x2 = -12

Divide each side by '3'.
x2 = -4

Simplifying
x2 = -4

Reorder the terms:
4 + x2 = -4 + 4

Combine like terms: -4 + 4 = 0
4 + x2 = 0

The solution to this equation could not be determined.

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