x^2-13x+80=0

Solution for x^2-13x+80=0 equation:

Simplifying
x2 + -13x + 80 = 0

Reorder the terms:
80 + -13x + x2 = 0

Solving
80 + -13x + 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 + -13x + -80 + x2 = 0 + -80

Reorder the terms:
80 + -80 + -13x + x2 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -13x + x2 = 0 + -80
-13x + x2 = 0 + -80

Combine like terms: 0 + -80 = -80
-13x + x2 = -80

The x term is -13x.  Take half its coefficient (-6.5).
Square it (42.25) and add it to both sides.

Add '42.25' to each side of the equation.
-13x + 42.25 + x2 = -80 + 42.25

Reorder the terms:
42.25 + -13x + x2 = -80 + 42.25

Combine like terms: -80 + 42.25 = -37.75
42.25 + -13x + x2 = -37.75

Factor a perfect square on the left side:
(x + -6.5)(x + -6.5) = -37.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.