x^2+16x+80=0

Solution for x^2+16x+80=0 equation:

Simplifying
x2 + 16x + 80 = 0

Reorder the terms:
80 + 16x + x2 = 0

Solving
80 + 16x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-80' to each side of the equation.
80 + 16x + -80 + x2 = 0 + -80

Reorder the terms:
80 + -80 + 16x + x2 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + 16x + x2 = 0 + -80
16x + x2 = 0 + -80

Combine like terms: 0 + -80 = -80
16x + x2 = -80

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = -80 + 64

Reorder the terms:
64 + 16x + x2 = -80 + 64

Combine like terms: -80 + 64 = -16
64 + 16x + x2 = -16

Factor a perfect square on the left side:
(x + 8)(x + 8) = -16

Can't calculate square root of the right side.

The solution to this equation could not be determined.