2s^2+15s+24=0

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Solution for 2s^2+15s+24=0 equation:


Simplifying
2s2 + 15s + 24 = 0

Reorder the terms:
24 + 15s + 2s2 = 0

Solving
24 + 15s + 2s2 = 0

Solving for variable 's'.

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

Divide each side by '2'.
12 + 7.5s + s2 = 0

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + 7.5s + -12 + s2 = 0 + -12

Reorder the terms:
12 + -12 + 7.5s + s2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 7.5s + s2 = 0 + -12
7.5s + s2 = 0 + -12

Combine like terms: 0 + -12 = -12
7.5s + s2 = -12

The s term is 7.5s.  Take half its coefficient (3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
7.5s + 14.0625 + s2 = -12 + 14.0625

Reorder the terms:
14.0625 + 7.5s + s2 = -12 + 14.0625

Combine like terms: -12 + 14.0625 = 2.0625
14.0625 + 7.5s + s2 = 2.0625

Factor a perfect square on the left side:
(s + 3.75)(s + 3.75) = 2.0625

Calculate the square root of the right side: 1.436140662

Break this problem into two subproblems by setting 
(s + 3.75) equal to 1.436140662 and -1.436140662.

Subproblem 1

s + 3.75 = 1.436140662 Simplifying s + 3.75 = 1.436140662 Reorder the terms: 3.75 + s = 1.436140662 Solving 3.75 + s = 1.436140662 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + s = 1.436140662 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + s = 1.436140662 + -3.75 s = 1.436140662 + -3.75 Combine like terms: 1.436140662 + -3.75 = -2.313859338 s = -2.313859338 Simplifying s = -2.313859338

Subproblem 2

s + 3.75 = -1.436140662 Simplifying s + 3.75 = -1.436140662 Reorder the terms: 3.75 + s = -1.436140662 Solving 3.75 + s = -1.436140662 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-3.75' to each side of the equation. 3.75 + -3.75 + s = -1.436140662 + -3.75 Combine like terms: 3.75 + -3.75 = 0.00 0.00 + s = -1.436140662 + -3.75 s = -1.436140662 + -3.75 Combine like terms: -1.436140662 + -3.75 = -5.186140662 s = -5.186140662 Simplifying s = -5.186140662

Solution

The solution to the problem is based on the solutions from the subproblems. s = {-2.313859338, -5.186140662}

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