x^2+2x=-17

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Solution for x^2+2x=-17 equation:


Simplifying
x2 + 2x = -17

Reorder the terms:
2x + x2 = -17

Solving
2x + x2 = -17

Solving for variable 'x'.

Reorder the terms:
17 + 2x + x2 = -17 + 17

Combine like terms: -17 + 17 = 0
17 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-17' to each side of the equation.
17 + 2x + -17 + x2 = 0 + -17

Reorder the terms:
17 + -17 + 2x + x2 = 0 + -17

Combine like terms: 17 + -17 = 0
0 + 2x + x2 = 0 + -17
2x + x2 = 0 + -17

Combine like terms: 0 + -17 = -17
2x + x2 = -17

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 = -17 + 1

Reorder the terms:
1 + 2x + x2 = -17 + 1

Combine like terms: -17 + 1 = -16
1 + 2x + x2 = -16

Factor a perfect square on the left side:
(x + 1)(x + 1) = -16

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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