s^2+12s=36

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Solution for s^2+12s=36 equation:


Simplifying
s2 + 12s = 36

Reorder the terms:
12s + s2 = 36

Solving
12s + s2 = 36

Solving for variable 's'.

Reorder the terms:
-36 + 12s + s2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + 12s + s2 = 0

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + 12s + 36 + s2 = 0 + 36

Reorder the terms:
-36 + 36 + 12s + s2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 12s + s2 = 0 + 36
12s + s2 = 0 + 36

Combine like terms: 0 + 36 = 36
12s + s2 = 36

The s term is 12s.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12s + 36 + s2 = 36 + 36

Reorder the terms:
36 + 12s + s2 = 36 + 36

Combine like terms: 36 + 36 = 72
36 + 12s + s2 = 72

Factor a perfect square on the left side:
(s + 6)(s + 6) = 72

Calculate the square root of the right side: 8.485281374

Break this problem into two subproblems by setting 
(s + 6) equal to 8.485281374 and -8.485281374.

Subproblem 1

s + 6 = 8.485281374 Simplifying s + 6 = 8.485281374 Reorder the terms: 6 + s = 8.485281374 Solving 6 + s = 8.485281374 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + s = 8.485281374 + -6 Combine like terms: 6 + -6 = 0 0 + s = 8.485281374 + -6 s = 8.485281374 + -6 Combine like terms: 8.485281374 + -6 = 2.485281374 s = 2.485281374 Simplifying s = 2.485281374

Subproblem 2

s + 6 = -8.485281374 Simplifying s + 6 = -8.485281374 Reorder the terms: 6 + s = -8.485281374 Solving 6 + s = -8.485281374 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + s = -8.485281374 + -6 Combine like terms: 6 + -6 = 0 0 + s = -8.485281374 + -6 s = -8.485281374 + -6 Combine like terms: -8.485281374 + -6 = -14.485281374 s = -14.485281374 Simplifying s = -14.485281374

Solution

The solution to the problem is based on the solutions from the subproblems. s = {2.485281374, -14.485281374}

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