187.5=.75v+0.06v^2

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Solution for 187.5=.75v+0.06v^2 equation:


Simplifying
187.5 = 0.75v + 0.06v2

Solving
187.5 = 0.75v + 0.06v2

Solving for variable 'v'.

Reorder the terms:
187.5 + -0.75v + -0.06v2 = 0.75v + -0.75v + 0.06v2 + -0.06v2

Combine like terms: 0.75v + -0.75v = 0.00
187.5 + -0.75v + -0.06v2 = 0.00 + 0.06v2 + -0.06v2
187.5 + -0.75v + -0.06v2 = 0.06v2 + -0.06v2

Combine like terms: 0.06v2 + -0.06v2 = 0.00
187.5 + -0.75v + -0.06v2 = 0.00

Begin completing the square.  Divide all terms by
-0.06 the coefficient of the squared term: 

Divide each side by '-0.06'.
-3125 + 12.5v + v2 = 0

Move the constant term to the right:

Add '3125' to each side of the equation.
-3125 + 12.5v + 3125 + v2 = 0 + 3125

Reorder the terms:
-3125 + 3125 + 12.5v + v2 = 0 + 3125

Combine like terms: -3125 + 3125 = 0
0 + 12.5v + v2 = 0 + 3125
12.5v + v2 = 0 + 3125

Combine like terms: 0 + 3125 = 3125
12.5v + v2 = 3125

The v term is 12.5v.  Take half its coefficient (6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
12.5v + 39.0625 + v2 = 3125 + 39.0625

Reorder the terms:
39.0625 + 12.5v + v2 = 3125 + 39.0625

Combine like terms: 3125 + 39.0625 = 3164.0625
39.0625 + 12.5v + v2 = 3164.0625

Factor a perfect square on the left side:
(v + 6.25)(v + 6.25) = 3164.0625

Calculate the square root of the right side: 56.25

Break this problem into two subproblems by setting 
(v + 6.25) equal to 56.25 and -56.25.

Subproblem 1

v + 6.25 = 56.25 Simplifying v + 6.25 = 56.25 Reorder the terms: 6.25 + v = 56.25 Solving 6.25 + v = 56.25 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-6.25' to each side of the equation. 6.25 + -6.25 + v = 56.25 + -6.25 Combine like terms: 6.25 + -6.25 = 0.00 0.00 + v = 56.25 + -6.25 v = 56.25 + -6.25 Combine like terms: 56.25 + -6.25 = 50 v = 50 Simplifying v = 50

Subproblem 2

v + 6.25 = -56.25 Simplifying v + 6.25 = -56.25 Reorder the terms: 6.25 + v = -56.25 Solving 6.25 + v = -56.25 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-6.25' to each side of the equation. 6.25 + -6.25 + v = -56.25 + -6.25 Combine like terms: 6.25 + -6.25 = 0.00 0.00 + v = -56.25 + -6.25 v = -56.25 + -6.25 Combine like terms: -56.25 + -6.25 = -62.5 v = -62.5 Simplifying v = -62.5

Solution

The solution to the problem is based on the solutions from the subproblems. v = {50, -62.5}

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