40=0.04v^2+1.1v

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Solution for 40=0.04v^2+1.1v equation:


Simplifying
40 = 0.04v2 + 1.1v

Reorder the terms:
40 = 1.1v + 0.04v2

Solving
40 = 1.1v + 0.04v2

Solving for variable 'v'.

Reorder the terms:
40 + -1.1v + -0.04v2 = 1.1v + -1.1v + 0.04v2 + -0.04v2

Combine like terms: 1.1v + -1.1v = 0.0
40 + -1.1v + -0.04v2 = 0.0 + 0.04v2 + -0.04v2
40 + -1.1v + -0.04v2 = 0.04v2 + -0.04v2

Combine like terms: 0.04v2 + -0.04v2 = 0.00
40 + -1.1v + -0.04v2 = 0.00

Begin completing the square.  Divide all terms by
-0.04 the coefficient of the squared term: 

Divide each side by '-0.04'.
-1000 + 27.5v + v2 = 0

Move the constant term to the right:

Add '1000' to each side of the equation.
-1000 + 27.5v + 1000 + v2 = 0 + 1000

Reorder the terms:
-1000 + 1000 + 27.5v + v2 = 0 + 1000

Combine like terms: -1000 + 1000 = 0
0 + 27.5v + v2 = 0 + 1000
27.5v + v2 = 0 + 1000

Combine like terms: 0 + 1000 = 1000
27.5v + v2 = 1000

The v term is 27.5v.  Take half its coefficient (13.75).
Square it (189.0625) and add it to both sides.

Add '189.0625' to each side of the equation.
27.5v + 189.0625 + v2 = 1000 + 189.0625

Reorder the terms:
189.0625 + 27.5v + v2 = 1000 + 189.0625

Combine like terms: 1000 + 189.0625 = 1189.0625
189.0625 + 27.5v + v2 = 1189.0625

Factor a perfect square on the left side:
(v + 13.75)(v + 13.75) = 1189.0625

Calculate the square root of the right side: 34.48278556

Break this problem into two subproblems by setting 
(v + 13.75) equal to 34.48278556 and -34.48278556.

Subproblem 1

v + 13.75 = 34.48278556 Simplifying v + 13.75 = 34.48278556 Reorder the terms: 13.75 + v = 34.48278556 Solving 13.75 + v = 34.48278556 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-13.75' to each side of the equation. 13.75 + -13.75 + v = 34.48278556 + -13.75 Combine like terms: 13.75 + -13.75 = 0.00 0.00 + v = 34.48278556 + -13.75 v = 34.48278556 + -13.75 Combine like terms: 34.48278556 + -13.75 = 20.73278556 v = 20.73278556 Simplifying v = 20.73278556

Subproblem 2

v + 13.75 = -34.48278556 Simplifying v + 13.75 = -34.48278556 Reorder the terms: 13.75 + v = -34.48278556 Solving 13.75 + v = -34.48278556 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-13.75' to each side of the equation. 13.75 + -13.75 + v = -34.48278556 + -13.75 Combine like terms: 13.75 + -13.75 = 0.00 0.00 + v = -34.48278556 + -13.75 v = -34.48278556 + -13.75 Combine like terms: -34.48278556 + -13.75 = -48.23278556 v = -48.23278556 Simplifying v = -48.23278556

Solution

The solution to the problem is based on the solutions from the subproblems. v = {20.73278556, -48.23278556}

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