75=0.05s^2+1.1s

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Solution for 75=0.05s^2+1.1s equation:


Simplifying
75 = 0.05s2 + 1.1s

Reorder the terms:
75 = 1.1s + 0.05s2

Solving
75 = 1.1s + 0.05s2

Solving for variable 's'.

Reorder the terms:
75 + -1.1s + -0.05s2 = 1.1s + -1.1s + 0.05s2 + -0.05s2

Combine like terms: 1.1s + -1.1s = 0.0
75 + -1.1s + -0.05s2 = 0.0 + 0.05s2 + -0.05s2
75 + -1.1s + -0.05s2 = 0.05s2 + -0.05s2

Combine like terms: 0.05s2 + -0.05s2 = 0.00
75 + -1.1s + -0.05s2 = 0.00

Begin completing the square.  Divide all terms by
-0.05 the coefficient of the squared term: 

Divide each side by '-0.05'.
-1500 + 22s + s2 = 0

Move the constant term to the right:

Add '1500' to each side of the equation.
-1500 + 22s + 1500 + s2 = 0 + 1500

Reorder the terms:
-1500 + 1500 + 22s + s2 = 0 + 1500

Combine like terms: -1500 + 1500 = 0
0 + 22s + s2 = 0 + 1500
22s + s2 = 0 + 1500

Combine like terms: 0 + 1500 = 1500
22s + s2 = 1500

The s term is 22s.  Take half its coefficient (11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
22s + 121 + s2 = 1500 + 121

Reorder the terms:
121 + 22s + s2 = 1500 + 121

Combine like terms: 1500 + 121 = 1621
121 + 22s + s2 = 1621

Factor a perfect square on the left side:
(s + 11)(s + 11) = 1621

Calculate the square root of the right side: 40.261644278

Break this problem into two subproblems by setting 
(s + 11) equal to 40.261644278 and -40.261644278.

Subproblem 1

s + 11 = 40.261644278 Simplifying s + 11 = 40.261644278 Reorder the terms: 11 + s = 40.261644278 Solving 11 + s = 40.261644278 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + s = 40.261644278 + -11 Combine like terms: 11 + -11 = 0 0 + s = 40.261644278 + -11 s = 40.261644278 + -11 Combine like terms: 40.261644278 + -11 = 29.261644278 s = 29.261644278 Simplifying s = 29.261644278

Subproblem 2

s + 11 = -40.261644278 Simplifying s + 11 = -40.261644278 Reorder the terms: 11 + s = -40.261644278 Solving 11 + s = -40.261644278 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + s = -40.261644278 + -11 Combine like terms: 11 + -11 = 0 0 + s = -40.261644278 + -11 s = -40.261644278 + -11 Combine like terms: -40.261644278 + -11 = -51.261644278 s = -51.261644278 Simplifying s = -51.261644278

Solution

The solution to the problem is based on the solutions from the subproblems. s = {29.261644278, -51.261644278}

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