s^2+14s-9=0

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Solution for s^2+14s-9=0 equation:


Simplifying
s2 + 14s + -9 = 0

Reorder the terms:
-9 + 14s + s2 = 0

Solving
-9 + 14s + s2 = 0

Solving for variable 's'.

Begin completing the square.

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 14s + 9 + s2 = 0 + 9

Reorder the terms:
-9 + 9 + 14s + s2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 14s + s2 = 0 + 9
14s + s2 = 0 + 9

Combine like terms: 0 + 9 = 9
14s + s2 = 9

The s term is 14s.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14s + 49 + s2 = 9 + 49

Reorder the terms:
49 + 14s + s2 = 9 + 49

Combine like terms: 9 + 49 = 58
49 + 14s + s2 = 58

Factor a perfect square on the left side:
(s + 7)(s + 7) = 58

Calculate the square root of the right side: 7.615773106

Break this problem into two subproblems by setting 
(s + 7) equal to 7.615773106 and -7.615773106.

Subproblem 1

s + 7 = 7.615773106 Simplifying s + 7 = 7.615773106 Reorder the terms: 7 + s = 7.615773106 Solving 7 + s = 7.615773106 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + s = 7.615773106 + -7 Combine like terms: 7 + -7 = 0 0 + s = 7.615773106 + -7 s = 7.615773106 + -7 Combine like terms: 7.615773106 + -7 = 0.615773106 s = 0.615773106 Simplifying s = 0.615773106

Subproblem 2

s + 7 = -7.615773106 Simplifying s + 7 = -7.615773106 Reorder the terms: 7 + s = -7.615773106 Solving 7 + s = -7.615773106 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + s = -7.615773106 + -7 Combine like terms: 7 + -7 = 0 0 + s = -7.615773106 + -7 s = -7.615773106 + -7 Combine like terms: -7.615773106 + -7 = -14.615773106 s = -14.615773106 Simplifying s = -14.615773106

Solution

The solution to the problem is based on the solutions from the subproblems. s = {0.615773106, -14.615773106}

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