-8s(-2s-19)+13=5s

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Solution for -8s(-2s-19)+13=5s equation:


Simplifying
-8s(-2s + -19) + 13 = 5s

Reorder the terms:
-8s(-19 + -2s) + 13 = 5s
(-19 * -8s + -2s * -8s) + 13 = 5s
(152s + 16s2) + 13 = 5s

Reorder the terms:
13 + 152s + 16s2 = 5s

Solving
13 + 152s + 16s2 = 5s

Solving for variable 's'.

Reorder the terms:
13 + 152s + -5s + 16s2 = 5s + -5s

Combine like terms: 152s + -5s = 147s
13 + 147s + 16s2 = 5s + -5s

Combine like terms: 5s + -5s = 0
13 + 147s + 16s2 = 0

Begin completing the square.  Divide all terms by
16 the coefficient of the squared term: 

Divide each side by '16'.
0.8125 + 9.1875s + s2 = 0

Move the constant term to the right:

Add '-0.8125' to each side of the equation.
0.8125 + 9.1875s + -0.8125 + s2 = 0 + -0.8125

Reorder the terms:
0.8125 + -0.8125 + 9.1875s + s2 = 0 + -0.8125

Combine like terms: 0.8125 + -0.8125 = 0.0000
0.0000 + 9.1875s + s2 = 0 + -0.8125
9.1875s + s2 = 0 + -0.8125

Combine like terms: 0 + -0.8125 = -0.8125
9.1875s + s2 = -0.8125

The s term is 9.1875s.  Take half its coefficient (4.59375).
Square it (21.10253906) and add it to both sides.

Add '21.10253906' to each side of the equation.
9.1875s + 21.10253906 + s2 = -0.8125 + 21.10253906

Reorder the terms:
21.10253906 + 9.1875s + s2 = -0.8125 + 21.10253906

Combine like terms: -0.8125 + 21.10253906 = 20.29003906
21.10253906 + 9.1875s + s2 = 20.29003906

Factor a perfect square on the left side:
(s + 4.59375)(s + 4.59375) = 20.29003906

Calculate the square root of the right side: 4.504446588

Break this problem into two subproblems by setting 
(s + 4.59375) equal to 4.504446588 and -4.504446588.

Subproblem 1

s + 4.59375 = 4.504446588 Simplifying s + 4.59375 = 4.504446588 Reorder the terms: 4.59375 + s = 4.504446588 Solving 4.59375 + s = 4.504446588 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-4.59375' to each side of the equation. 4.59375 + -4.59375 + s = 4.504446588 + -4.59375 Combine like terms: 4.59375 + -4.59375 = 0.00000 0.00000 + s = 4.504446588 + -4.59375 s = 4.504446588 + -4.59375 Combine like terms: 4.504446588 + -4.59375 = -0.089303412 s = -0.089303412 Simplifying s = -0.089303412

Subproblem 2

s + 4.59375 = -4.504446588 Simplifying s + 4.59375 = -4.504446588 Reorder the terms: 4.59375 + s = -4.504446588 Solving 4.59375 + s = -4.504446588 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-4.59375' to each side of the equation. 4.59375 + -4.59375 + s = -4.504446588 + -4.59375 Combine like terms: 4.59375 + -4.59375 = 0.00000 0.00000 + s = -4.504446588 + -4.59375 s = -4.504446588 + -4.59375 Combine like terms: -4.504446588 + -4.59375 = -9.098196588 s = -9.098196588 Simplifying s = -9.098196588

Solution

The solution to the problem is based on the solutions from the subproblems. s = {-0.089303412, -9.098196588}

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