100v^2-220v=121

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Solution for 100v^2-220v=121 equation:


Simplifying
100v2 + -220v = 121

Reorder the terms:
-220v + 100v2 = 121

Solving
-220v + 100v2 = 121

Solving for variable 'v'.

Reorder the terms:
-121 + -220v + 100v2 = 121 + -121

Combine like terms: 121 + -121 = 0
-121 + -220v + 100v2 = 0

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

Divide each side by '100'.
-1.21 + -2.2v + v2 = 0

Move the constant term to the right:

Add '1.21' to each side of the equation.
-1.21 + -2.2v + 1.21 + v2 = 0 + 1.21

Reorder the terms:
-1.21 + 1.21 + -2.2v + v2 = 0 + 1.21

Combine like terms: -1.21 + 1.21 = 0.00
0.00 + -2.2v + v2 = 0 + 1.21
-2.2v + v2 = 0 + 1.21

Combine like terms: 0 + 1.21 = 1.21
-2.2v + v2 = 1.21

The v term is -2.2v.  Take half its coefficient (-1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
-2.2v + 1.21 + v2 = 1.21 + 1.21

Reorder the terms:
1.21 + -2.2v + v2 = 1.21 + 1.21

Combine like terms: 1.21 + 1.21 = 2.42
1.21 + -2.2v + v2 = 2.42

Factor a perfect square on the left side:
(v + -1.1)(v + -1.1) = 2.42

Calculate the square root of the right side: 1.555634919

Break this problem into two subproblems by setting 
(v + -1.1) equal to 1.555634919 and -1.555634919.

Subproblem 1

v + -1.1 = 1.555634919 Simplifying v + -1.1 = 1.555634919 Reorder the terms: -1.1 + v = 1.555634919 Solving -1.1 + v = 1.555634919 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + v = 1.555634919 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + v = 1.555634919 + 1.1 v = 1.555634919 + 1.1 Combine like terms: 1.555634919 + 1.1 = 2.655634919 v = 2.655634919 Simplifying v = 2.655634919

Subproblem 2

v + -1.1 = -1.555634919 Simplifying v + -1.1 = -1.555634919 Reorder the terms: -1.1 + v = -1.555634919 Solving -1.1 + v = -1.555634919 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + v = -1.555634919 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + v = -1.555634919 + 1.1 v = -1.555634919 + 1.1 Combine like terms: -1.555634919 + 1.1 = -0.455634919 v = -0.455634919 Simplifying v = -0.455634919

Solution

The solution to the problem is based on the solutions from the subproblems. v = {2.655634919, -0.455634919}

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