x^2=-2x-19

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


Simplifying
x2 = -2x + -19

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

Solving
x2 = -19 + -2x

Solving for variable 'x'.

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

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

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

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

Begin completing the square.

Move the constant term to the right:

Add '-19' to each side of the equation.
19 + 2x + -19 + x2 = 0 + -19

Reorder the terms:
19 + -19 + 2x + x2 = 0 + -19

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

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

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

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

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

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

Factor a perfect square on the left side:
(x + 1)(x + 1) = -18

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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