y^2-16y+80=0

Solution for y^2-16y+80=0 equation:

Simplifying
y2 + -16y + 80 = 0

Reorder the terms:
80 + -16y + y2 = 0

Solving
80 + -16y + y2 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-80' to each side of the equation.
80 + -16y + -80 + y2 = 0 + -80

Reorder the terms:
80 + -80 + -16y + y2 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -16y + y2 = 0 + -80
-16y + y2 = 0 + -80

Combine like terms: 0 + -80 = -80
-16y + y2 = -80

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

Add '64' to each side of the equation.
-16y + 64 + y2 = -80 + 64

Reorder the terms:
64 + -16y + y2 = -80 + 64

Combine like terms: -80 + 64 = -16
64 + -16y + y2 = -16

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

Can't calculate square root of the right side.

The solution to this equation could not be determined.