x^2+6x=-16

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Solution for x^2+6x=-16 equation:


Simplifying
x2 + 6x = -16

Reorder the terms:
6x + x2 = -16

Solving
6x + x2 = -16

Solving for variable 'x'.

Reorder the terms:
16 + 6x + x2 = -16 + 16

Combine like terms: -16 + 16 = 0
16 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + 6x + -16 + x2 = 0 + -16

Reorder the terms:
16 + -16 + 6x + x2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + 6x + x2 = 0 + -16
6x + x2 = 0 + -16

Combine like terms: 0 + -16 = -16
6x + x2 = -16

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = -16 + 9

Reorder the terms:
9 + 6x + x2 = -16 + 9

Combine like terms: -16 + 9 = -7
9 + 6x + x2 = -7

Factor a perfect square on the left side:
(x + 3)(x + 3) = -7

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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