10v^2=18v+3

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Solution for 10v^2=18v+3 equation:


Simplifying
10v2 = 18v + 3

Reorder the terms:
10v2 = 3 + 18v

Solving
10v2 = 3 + 18v

Solving for variable 'v'.

Reorder the terms:
-3 + -18v + 10v2 = 3 + 18v + -3 + -18v

Reorder the terms:
-3 + -18v + 10v2 = 3 + -3 + 18v + -18v

Combine like terms: 3 + -3 = 0
-3 + -18v + 10v2 = 0 + 18v + -18v
-3 + -18v + 10v2 = 18v + -18v

Combine like terms: 18v + -18v = 0
-3 + -18v + 10v2 = 0

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

Divide each side by '10'.
-0.3 + -1.8v + v2 = 0

Move the constant term to the right:

Add '0.3' to each side of the equation.
-0.3 + -1.8v + 0.3 + v2 = 0 + 0.3

Reorder the terms:
-0.3 + 0.3 + -1.8v + v2 = 0 + 0.3

Combine like terms: -0.3 + 0.3 = 0.0
0.0 + -1.8v + v2 = 0 + 0.3
-1.8v + v2 = 0 + 0.3

Combine like terms: 0 + 0.3 = 0.3
-1.8v + v2 = 0.3

The v term is -1.8v.  Take half its coefficient (-0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
-1.8v + 0.81 + v2 = 0.3 + 0.81

Reorder the terms:
0.81 + -1.8v + v2 = 0.3 + 0.81

Combine like terms: 0.3 + 0.81 = 1.11
0.81 + -1.8v + v2 = 1.11

Factor a perfect square on the left side:
(v + -0.9)(v + -0.9) = 1.11

Calculate the square root of the right side: 1.053565375

Break this problem into two subproblems by setting 
(v + -0.9) equal to 1.053565375 and -1.053565375.

Subproblem 1

v + -0.9 = 1.053565375 Simplifying v + -0.9 = 1.053565375 Reorder the terms: -0.9 + v = 1.053565375 Solving -0.9 + v = 1.053565375 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + v = 1.053565375 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + v = 1.053565375 + 0.9 v = 1.053565375 + 0.9 Combine like terms: 1.053565375 + 0.9 = 1.953565375 v = 1.953565375 Simplifying v = 1.953565375

Subproblem 2

v + -0.9 = -1.053565375 Simplifying v + -0.9 = -1.053565375 Reorder the terms: -0.9 + v = -1.053565375 Solving -0.9 + v = -1.053565375 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + v = -1.053565375 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + v = -1.053565375 + 0.9 v = -1.053565375 + 0.9 Combine like terms: -1.053565375 + 0.9 = -0.153565375 v = -0.153565375 Simplifying v = -0.153565375

Solution

The solution to the problem is based on the solutions from the subproblems. v = {1.953565375, -0.153565375}

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