2x^2-1=-19

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Solution for 2x^2-1=-19 equation:


Simplifying
2x2 + -1 = -19

Reorder the terms:
-1 + 2x2 = -19

Solving
-1 + 2x2 = -19

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 2x2 = -19 + 1

Combine like terms: -1 + 1 = 0
0 + 2x2 = -19 + 1
2x2 = -19 + 1

Combine like terms: -19 + 1 = -18
2x2 = -18

Divide each side by '2'.
x2 = -9

Simplifying
x2 = -9

Reorder the terms:
9 + x2 = -9 + 9

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

The solution to this equation could not be determined.

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