3x^2-7=-31

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Solution for 3x^2-7=-31 equation:


Simplifying
3x2 + -7 = -31

Reorder the terms:
-7 + 3x2 = -31

Solving
-7 + 3x2 = -31

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + 3x2 = -31 + 7

Combine like terms: -7 + 7 = 0
0 + 3x2 = -31 + 7
3x2 = -31 + 7

Combine like terms: -31 + 7 = -24
3x2 = -24

Divide each side by '3'.
x2 = -8

Simplifying
x2 = -8

Reorder the terms:
8 + x2 = -8 + 8

Combine like terms: -8 + 8 = 0
8 + x2 = 0

The solution to this equation could not be determined.

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