3s^2+8s-360=0

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Solution for 3s^2+8s-360=0 equation:


Simplifying
3s2 + 8s + -360 = 0

Reorder the terms:
-360 + 8s + 3s2 = 0

Solving
-360 + 8s + 3s2 = 0

Solving for variable 's'.

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

Divide each side by '3'.
-120 + 2.666666667s + s2 = 0

Move the constant term to the right:

Add '120' to each side of the equation.
-120 + 2.666666667s + 120 + s2 = 0 + 120

Reorder the terms:
-120 + 120 + 2.666666667s + s2 = 0 + 120

Combine like terms: -120 + 120 = 0
0 + 2.666666667s + s2 = 0 + 120
2.666666667s + s2 = 0 + 120

Combine like terms: 0 + 120 = 120
2.666666667s + s2 = 120

The s term is 2.666666667s.  Take half its coefficient (1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
2.666666667s + 1.777777780 + s2 = 120 + 1.777777780

Reorder the terms:
1.777777780 + 2.666666667s + s2 = 120 + 1.777777780

Combine like terms: 120 + 1.777777780 = 121.77777778
1.777777780 + 2.666666667s + s2 = 121.77777778

Factor a perfect square on the left side:
(s + 1.333333334)(s + 1.333333334) = 121.77777778

Calculate the square root of the right side: 11.035296905

Break this problem into two subproblems by setting 
(s + 1.333333334) equal to 11.035296905 and -11.035296905.

Subproblem 1

s + 1.333333334 = 11.035296905 Simplifying s + 1.333333334 = 11.035296905 Reorder the terms: 1.333333334 + s = 11.035296905 Solving 1.333333334 + s = 11.035296905 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-1.333333334' to each side of the equation. 1.333333334 + -1.333333334 + s = 11.035296905 + -1.333333334 Combine like terms: 1.333333334 + -1.333333334 = 0.000000000 0.000000000 + s = 11.035296905 + -1.333333334 s = 11.035296905 + -1.333333334 Combine like terms: 11.035296905 + -1.333333334 = 9.701963571 s = 9.701963571 Simplifying s = 9.701963571

Subproblem 2

s + 1.333333334 = -11.035296905 Simplifying s + 1.333333334 = -11.035296905 Reorder the terms: 1.333333334 + s = -11.035296905 Solving 1.333333334 + s = -11.035296905 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-1.333333334' to each side of the equation. 1.333333334 + -1.333333334 + s = -11.035296905 + -1.333333334 Combine like terms: 1.333333334 + -1.333333334 = 0.000000000 0.000000000 + s = -11.035296905 + -1.333333334 s = -11.035296905 + -1.333333334 Combine like terms: -11.035296905 + -1.333333334 = -12.368630239 s = -12.368630239 Simplifying s = -12.368630239

Solution

The solution to the problem is based on the solutions from the subproblems. s = {9.701963571, -12.368630239}

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