13x(x-5)=-5-8

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Solution for 13x(x-5)=-5-8 equation: 


Simplifying
13x(x + -5) = -5 + -8

Reorder the terms:
13x(-5 + x) = -5 + -8
(-5 * 13x + x * 13x) = -5 + -8
(-65x + 13x2) = -5 + -8

Combine like terms: -5 + -8 = -13
-65x + 13x2 = -13

Solving
-65x + 13x2 = -13

Solving for variable 'x'.

Reorder the terms:
13 + -65x + 13x2 = -13 + 13

Combine like terms: -13 + 13 = 0
13 + -65x + 13x2 = 0

Factor out the Greatest Common Factor (GCF), '13'.
13(1 + -5x + x2) = 0

Ignore the factor 13.

Subproblem 1
Set the factor '(1 + -5x + x2)' equal to zero and attempt to solve:

Simplifying
1 + -5x + x2 = 0

Solving
1 + -5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -5x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -5x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -5x + x2 = 0 + -1
-5x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-5x + x2 = -1

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -1 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -1 + 6.25

Combine like terms: -1 + 6.25 = 5.25
6.25 + -5x + x2 = 5.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 5.25

Calculate the square root of the right side: 2.291287847

Break this problem into two subproblems by setting 
(x + -2.5) equal to 2.291287847 and -2.291287847.


Subproblem 1
x + -2.5 = 2.291287847

Simplifying
x + -2.5 = 2.291287847

Reorder the terms:
-2.5 + x = 2.291287847

Solving
-2.5 + x = 2.291287847

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '2.5' to each side of the equation.
-2.5 + 2.5 + x = 2.291287847 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + x = 2.291287847 + 2.5
x = 2.291287847 + 2.5

Combine like terms: 2.291287847 + 2.5 = 4.791287847
x = 4.791287847

Simplifying
x = 4.791287847


Subproblem 2
x + -2.5 = -2.291287847

Simplifying
x + -2.5 = -2.291287847

Reorder the terms:
-2.5 + x = -2.291287847

Solving
-2.5 + x = -2.291287847

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '2.5' to each side of the equation.
-2.5 + 2.5 + x = -2.291287847 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0
0.0 + x = -2.291287847 + 2.5
x = -2.291287847 + 2.5

Combine like terms: -2.291287847 + 2.5 = 0.208712153
x = 0.208712153

Simplifying
x = 0.208712153


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {4.791287847, 0.208712153}
Solution
x = {4.791287847, 0.208712153}

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