s^2+5s+6.25=0

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Solution for s^2+5s+6.25=0 equation:


Simplifying
s2 + 5s + 6.25 = 0

Reorder the terms:
6.25 + 5s + s2 = 0

Solving
6.25 + 5s + s2 = 0

Solving for variable 's'.

Begin completing the square.

Move the constant term to the right:

Add '-6.25' to each side of the equation.
6.25 + 5s + -6.25 + s2 = 0 + -6.25

Reorder the terms:
6.25 + -6.25 + 5s + s2 = 0 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
0.00 + 5s + s2 = 0 + -6.25
5s + s2 = 0 + -6.25

Combine like terms: 0 + -6.25 = -6.25
5s + s2 = -6.25

The s term is 5s.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5s + 6.25 + s2 = -6.25 + 6.25

Reorder the terms:
6.25 + 5s + s2 = -6.25 + 6.25

Combine like terms: -6.25 + 6.25 = 0.00
6.25 + 5s + s2 = 0.00

Factor a perfect square on the left side:
(s + 2.5)(s + 2.5) = 0.00

Calculate the square root of the right side: 0.00

Break this problem into two subproblems by setting 
(s + 2.5) equal to 0.00 and 0.00.

Subproblem 1

s + 2.5 = 0.00 Simplifying s + 2.5 = 0.00 Reorder the terms: 2.5 + s = 0.00 Solving 2.5 + s = 0.00 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + s = 0.00 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + s = 0.00 + -2.5 s = 0.00 + -2.5 Combine like terms: 0.00 + -2.5 = -2.5 s = -2.5 Simplifying s = -2.5

Subproblem 2

s + 2.5 = 0.00 Simplifying s + 2.5 = 0.00 Reorder the terms: 2.5 + s = 0.00 Solving 2.5 + s = 0.00 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + s = 0.00 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + s = 0.00 + -2.5 s = 0.00 + -2.5 Combine like terms: 0.00 + -2.5 = -2.5 s = -2.5 Simplifying s = -2.5

Solution

The solution to the problem is based on the solutions from the subproblems. s = {-2.5, -2.5}

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