4s^2+16s+5=

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Solution for 4s^2+16s+5= equation:


Simplifying
4s2 + 16s + 5 = 0

Reorder the terms:
5 + 16s + 4s2 = 0

Solving
5 + 16s + 4s2 = 0

Solving for variable 's'.

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

Divide each side by '4'.
1.25 + 4s + s2 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + 4s + -1.25 + s2 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + 4s + s2 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + 4s + s2 = 0 + -1.25
4s + s2 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
4s + s2 = -1.25

The s term is 4s.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4s + 4 + s2 = -1.25 + 4

Reorder the terms:
4 + 4s + s2 = -1.25 + 4

Combine like terms: -1.25 + 4 = 2.75
4 + 4s + s2 = 2.75

Factor a perfect square on the left side:
(s + 2)(s + 2) = 2.75

Calculate the square root of the right side: 1.658312395

Break this problem into two subproblems by setting 
(s + 2) equal to 1.658312395 and -1.658312395.

Subproblem 1

s + 2 = 1.658312395 Simplifying s + 2 = 1.658312395 Reorder the terms: 2 + s = 1.658312395 Solving 2 + s = 1.658312395 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + s = 1.658312395 + -2 Combine like terms: 2 + -2 = 0 0 + s = 1.658312395 + -2 s = 1.658312395 + -2 Combine like terms: 1.658312395 + -2 = -0.341687605 s = -0.341687605 Simplifying s = -0.341687605

Subproblem 2

s + 2 = -1.658312395 Simplifying s + 2 = -1.658312395 Reorder the terms: 2 + s = -1.658312395 Solving 2 + s = -1.658312395 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + s = -1.658312395 + -2 Combine like terms: 2 + -2 = 0 0 + s = -1.658312395 + -2 s = -1.658312395 + -2 Combine like terms: -1.658312395 + -2 = -3.658312395 s = -3.658312395 Simplifying s = -3.658312395

Solution

The solution to the problem is based on the solutions from the subproblems. s = {-0.341687605, -3.658312395}

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