x^2+6x+9=-16

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Solution for x^2+6x+9=-16 equation:


Simplifying
x2 + 6x + 9 = -16

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

Solving
9 + 6x + x2 = -16

Solving for variable 'x'.

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

Combine like terms: 9 + 16 = 25
25 + 6x + x2 = -16 + 16

Combine like terms: -16 + 16 = 0
25 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + 6x + -25 + x2 = 0 + -25

Reorder the terms:
25 + -25 + 6x + x2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + 6x + x2 = 0 + -25
6x + x2 = 0 + -25

Combine like terms: 0 + -25 = -25
6x + x2 = -25

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 = -25 + 9

Reorder the terms:
9 + 6x + x2 = -25 + 9

Combine like terms: -25 + 9 = -16
9 + 6x + x2 = -16

Factor a perfect square on the left side:
(x + 3)(x + 3) = -16

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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