5s^2-10s=23

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Solution for 5s^2-10s=23 equation:


Simplifying
5s2 + -10s = 23

Reorder the terms:
-10s + 5s2 = 23

Solving
-10s + 5s2 = 23

Solving for variable 's'.

Reorder the terms:
-23 + -10s + 5s2 = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + -10s + 5s2 = 0

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

Divide each side by '5'.
-4.6 + -2s + s2 = 0

Move the constant term to the right:

Add '4.6' to each side of the equation.
-4.6 + -2s + 4.6 + s2 = 0 + 4.6

Reorder the terms:
-4.6 + 4.6 + -2s + s2 = 0 + 4.6

Combine like terms: -4.6 + 4.6 = 0.0
0.0 + -2s + s2 = 0 + 4.6
-2s + s2 = 0 + 4.6

Combine like terms: 0 + 4.6 = 4.6
-2s + s2 = 4.6

The s term is -2s.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2s + 1 + s2 = 4.6 + 1

Reorder the terms:
1 + -2s + s2 = 4.6 + 1

Combine like terms: 4.6 + 1 = 5.6
1 + -2s + s2 = 5.6

Factor a perfect square on the left side:
(s + -1)(s + -1) = 5.6

Calculate the square root of the right side: 2.366431913

Break this problem into two subproblems by setting 
(s + -1) equal to 2.366431913 and -2.366431913.

Subproblem 1

s + -1 = 2.366431913 Simplifying s + -1 = 2.366431913 Reorder the terms: -1 + s = 2.366431913 Solving -1 + s = 2.366431913 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + s = 2.366431913 + 1 Combine like terms: -1 + 1 = 0 0 + s = 2.366431913 + 1 s = 2.366431913 + 1 Combine like terms: 2.366431913 + 1 = 3.366431913 s = 3.366431913 Simplifying s = 3.366431913

Subproblem 2

s + -1 = -2.366431913 Simplifying s + -1 = -2.366431913 Reorder the terms: -1 + s = -2.366431913 Solving -1 + s = -2.366431913 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + s = -2.366431913 + 1 Combine like terms: -1 + 1 = 0 0 + s = -2.366431913 + 1 s = -2.366431913 + 1 Combine like terms: -2.366431913 + 1 = -1.366431913 s = -1.366431913 Simplifying s = -1.366431913

Solution

The solution to the problem is based on the solutions from the subproblems. s = {3.366431913, -1.366431913}

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