x^2+(-13)x+(-109.04)=0

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Solution for x^2+(-13)x+(-109.04)=0 equation:


Simplifying
x2 + (-13) * x + (-109.04) = 0
x2 + -13x + -109.04 = 0

Reorder the terms:
-109.04 + -13x + x2 = 0

Solving
-109.04 + -13x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '109.04' to each side of the equation.
-109.04 + -13x + 109.04 + x2 = 0 + 109.04

Reorder the terms:
-109.04 + 109.04 + -13x + x2 = 0 + 109.04

Combine like terms: -109.04 + 109.04 = 0.00
0.00 + -13x + x2 = 0 + 109.04
-13x + x2 = 0 + 109.04

Combine like terms: 0 + 109.04 = 109.04
-13x + x2 = 109.04

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 = 109.04 + 42.25

Reorder the terms:
42.25 + -13x + x2 = 109.04 + 42.25

Combine like terms: 109.04 + 42.25 = 151.29
42.25 + -13x + x2 = 151.29

Factor a perfect square on the left side:
(x + -6.5)(x + -6.5) = 151.29

Calculate the square root of the right side: 12.3

Break this problem into two subproblems by setting 
(x + -6.5) equal to 12.3 and -12.3.

Subproblem 1

x + -6.5 = 12.3 Simplifying x + -6.5 = 12.3 Reorder the terms: -6.5 + x = 12.3 Solving -6.5 + x = 12.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = 12.3 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 12.3 + 6.5 x = 12.3 + 6.5 Combine like terms: 12.3 + 6.5 = 18.8 x = 18.8 Simplifying x = 18.8

Subproblem 2

x + -6.5 = -12.3 Simplifying x + -6.5 = -12.3 Reorder the terms: -6.5 + x = -12.3 Solving -6.5 + x = -12.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = -12.3 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -12.3 + 6.5 x = -12.3 + 6.5 Combine like terms: -12.3 + 6.5 = -5.8 x = -5.8 Simplifying x = -5.8

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.8, -5.8}

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