s^2=64-8s

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Solution for s^2=64-8s equation:


Simplifying
s2 = 64 + -8s

Solving
s2 = 64 + -8s

Solving for variable 's'.

Reorder the terms:
-64 + 8s + s2 = 64 + -8s + -64 + 8s

Reorder the terms:
-64 + 8s + s2 = 64 + -64 + -8s + 8s

Combine like terms: 64 + -64 = 0
-64 + 8s + s2 = 0 + -8s + 8s
-64 + 8s + s2 = -8s + 8s

Combine like terms: -8s + 8s = 0
-64 + 8s + s2 = 0

Begin completing the square.

Move the constant term to the right:

Add '64' to each side of the equation.
-64 + 8s + 64 + s2 = 0 + 64

Reorder the terms:
-64 + 64 + 8s + s2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + 8s + s2 = 0 + 64
8s + s2 = 0 + 64

Combine like terms: 0 + 64 = 64
8s + s2 = 64

The s term is 8s.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8s + 16 + s2 = 64 + 16

Reorder the terms:
16 + 8s + s2 = 64 + 16

Combine like terms: 64 + 16 = 80
16 + 8s + s2 = 80

Factor a perfect square on the left side:
(s + 4)(s + 4) = 80

Calculate the square root of the right side: 8.94427191

Break this problem into two subproblems by setting 
(s + 4) equal to 8.94427191 and -8.94427191.

Subproblem 1

s + 4 = 8.94427191 Simplifying s + 4 = 8.94427191 Reorder the terms: 4 + s = 8.94427191 Solving 4 + s = 8.94427191 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + s = 8.94427191 + -4 Combine like terms: 4 + -4 = 0 0 + s = 8.94427191 + -4 s = 8.94427191 + -4 Combine like terms: 8.94427191 + -4 = 4.94427191 s = 4.94427191 Simplifying s = 4.94427191

Subproblem 2

s + 4 = -8.94427191 Simplifying s + 4 = -8.94427191 Reorder the terms: 4 + s = -8.94427191 Solving 4 + s = -8.94427191 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + s = -8.94427191 + -4 Combine like terms: 4 + -4 = 0 0 + s = -8.94427191 + -4 s = -8.94427191 + -4 Combine like terms: -8.94427191 + -4 = -12.94427191 s = -12.94427191 Simplifying s = -12.94427191

Solution

The solution to the problem is based on the solutions from the subproblems. s = {4.94427191, -12.94427191}

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