0.02v^2+1.4v-480=0

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Solution for 0.02v^2+1.4v-480=0 equation:


Simplifying
0.02v2 + 1.4v + -480 = 0

Reorder the terms:
-480 + 1.4v + 0.02v2 = 0

Solving
-480 + 1.4v + 0.02v2 = 0

Solving for variable 'v'.

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

Divide each side by '0.02'.
-24000 + 70v + v2 = 0

Move the constant term to the right:

Add '24000' to each side of the equation.
-24000 + 70v + 24000 + v2 = 0 + 24000

Reorder the terms:
-24000 + 24000 + 70v + v2 = 0 + 24000

Combine like terms: -24000 + 24000 = 0
0 + 70v + v2 = 0 + 24000
70v + v2 = 0 + 24000

Combine like terms: 0 + 24000 = 24000
70v + v2 = 24000

The v term is 70v.  Take half its coefficient (35).
Square it (1225) and add it to both sides.

Add '1225' to each side of the equation.
70v + 1225 + v2 = 24000 + 1225

Reorder the terms:
1225 + 70v + v2 = 24000 + 1225

Combine like terms: 24000 + 1225 = 25225
1225 + 70v + v2 = 25225

Factor a perfect square on the left side:
(v + 35)(v + 35) = 25225

Calculate the square root of the right side: 158.823801743

Break this problem into two subproblems by setting 
(v + 35) equal to 158.823801743 and -158.823801743.

Subproblem 1

v + 35 = 158.823801743 Simplifying v + 35 = 158.823801743 Reorder the terms: 35 + v = 158.823801743 Solving 35 + v = 158.823801743 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + v = 158.823801743 + -35 Combine like terms: 35 + -35 = 0 0 + v = 158.823801743 + -35 v = 158.823801743 + -35 Combine like terms: 158.823801743 + -35 = 123.823801743 v = 123.823801743 Simplifying v = 123.823801743

Subproblem 2

v + 35 = -158.823801743 Simplifying v + 35 = -158.823801743 Reorder the terms: 35 + v = -158.823801743 Solving 35 + v = -158.823801743 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + v = -158.823801743 + -35 Combine like terms: 35 + -35 = 0 0 + v = -158.823801743 + -35 v = -158.823801743 + -35 Combine like terms: -158.823801743 + -35 = -193.823801743 v = -193.823801743 Simplifying v = -193.823801743

Solution

The solution to the problem is based on the solutions from the subproblems. v = {123.823801743, -193.823801743}

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