169=s^2+3s+9

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Solution for 169=s^2+3s+9 equation:


Simplifying
169 = s2 + 3s + 9

Reorder the terms:
169 = 9 + 3s + s2

Solving
169 = 9 + 3s + s2

Solving for variable 's'.

Combine like terms: 169 + -9 = 160
160 + -3s + -1s2 = 9 + 3s + s2 + -9 + -3s + -1s2

Reorder the terms:
160 + -3s + -1s2 = 9 + -9 + 3s + -3s + s2 + -1s2

Combine like terms: 9 + -9 = 0
160 + -3s + -1s2 = 0 + 3s + -3s + s2 + -1s2
160 + -3s + -1s2 = 3s + -3s + s2 + -1s2

Combine like terms: 3s + -3s = 0
160 + -3s + -1s2 = 0 + s2 + -1s2
160 + -3s + -1s2 = s2 + -1s2

Combine like terms: s2 + -1s2 = 0
160 + -3s + -1s2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-160 + 3s + s2 = 0

Move the constant term to the right:

Add '160' to each side of the equation.
-160 + 3s + 160 + s2 = 0 + 160

Reorder the terms:
-160 + 160 + 3s + s2 = 0 + 160

Combine like terms: -160 + 160 = 0
0 + 3s + s2 = 0 + 160
3s + s2 = 0 + 160

Combine like terms: 0 + 160 = 160
3s + s2 = 160

The s term is 3s.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3s + 2.25 + s2 = 160 + 2.25

Reorder the terms:
2.25 + 3s + s2 = 160 + 2.25

Combine like terms: 160 + 2.25 = 162.25
2.25 + 3s + s2 = 162.25

Factor a perfect square on the left side:
(s + 1.5)(s + 1.5) = 162.25

Calculate the square root of the right side: 12.737739203

Break this problem into two subproblems by setting 
(s + 1.5) equal to 12.737739203 and -12.737739203.

Subproblem 1

s + 1.5 = 12.737739203 Simplifying s + 1.5 = 12.737739203 Reorder the terms: 1.5 + s = 12.737739203 Solving 1.5 + s = 12.737739203 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + s = 12.737739203 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + s = 12.737739203 + -1.5 s = 12.737739203 + -1.5 Combine like terms: 12.737739203 + -1.5 = 11.237739203 s = 11.237739203 Simplifying s = 11.237739203

Subproblem 2

s + 1.5 = -12.737739203 Simplifying s + 1.5 = -12.737739203 Reorder the terms: 1.5 + s = -12.737739203 Solving 1.5 + s = -12.737739203 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + s = -12.737739203 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + s = -12.737739203 + -1.5 s = -12.737739203 + -1.5 Combine like terms: -12.737739203 + -1.5 = -14.237739203 s = -14.237739203 Simplifying s = -14.237739203

Solution

The solution to the problem is based on the solutions from the subproblems. s = {11.237739203, -14.237739203}

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