0.04v^2+0.8v-96=0

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Solution for 0.04v^2+0.8v-96=0 equation:


Simplifying
0.04v2 + 0.8v + -96 = 0

Reorder the terms:
-96 + 0.8v + 0.04v2 = 0

Solving
-96 + 0.8v + 0.04v2 = 0

Solving for variable 'v'.

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

Divide each side by '0.04'.
-2400 + 20v + v2 = 0

Move the constant term to the right:

Add '2400' to each side of the equation.
-2400 + 20v + 2400 + v2 = 0 + 2400

Reorder the terms:
-2400 + 2400 + 20v + v2 = 0 + 2400

Combine like terms: -2400 + 2400 = 0
0 + 20v + v2 = 0 + 2400
20v + v2 = 0 + 2400

Combine like terms: 0 + 2400 = 2400
20v + v2 = 2400

The v term is 20v.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20v + 100 + v2 = 2400 + 100

Reorder the terms:
100 + 20v + v2 = 2400 + 100

Combine like terms: 2400 + 100 = 2500
100 + 20v + v2 = 2500

Factor a perfect square on the left side:
(v + 10)(v + 10) = 2500

Calculate the square root of the right side: 50

Break this problem into two subproblems by setting 
(v + 10) equal to 50 and -50.

Subproblem 1

v + 10 = 50 Simplifying v + 10 = 50 Reorder the terms: 10 + v = 50 Solving 10 + v = 50 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + v = 50 + -10 Combine like terms: 10 + -10 = 0 0 + v = 50 + -10 v = 50 + -10 Combine like terms: 50 + -10 = 40 v = 40 Simplifying v = 40

Subproblem 2

v + 10 = -50 Simplifying v + 10 = -50 Reorder the terms: 10 + v = -50 Solving 10 + v = -50 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + v = -50 + -10 Combine like terms: 10 + -10 = 0 0 + v = -50 + -10 v = -50 + -10 Combine like terms: -50 + -10 = -60 v = -60 Simplifying v = -60

Solution

The solution to the problem is based on the solutions from the subproblems. v = {40, -60}

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