6v^2-21v+10=0

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Solution for 6v^2-21v+10=0 equation:


Simplifying
6v2 + -21v + 10 = 0

Reorder the terms:
10 + -21v + 6v2 = 0

Solving
10 + -21v + 6v2 = 0

Solving for variable 'v'.

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

Divide each side by '6'.
1.666666667 + -3.5v + v2 = 0

Move the constant term to the right:

Add '-1.666666667' to each side of the equation.
1.666666667 + -3.5v + -1.666666667 + v2 = 0 + -1.666666667

Reorder the terms:
1.666666667 + -1.666666667 + -3.5v + v2 = 0 + -1.666666667

Combine like terms: 1.666666667 + -1.666666667 = 0.000000000
0.000000000 + -3.5v + v2 = 0 + -1.666666667
-3.5v + v2 = 0 + -1.666666667

Combine like terms: 0 + -1.666666667 = -1.666666667
-3.5v + v2 = -1.666666667

The v term is -3.5v.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5v + 3.0625 + v2 = -1.666666667 + 3.0625

Reorder the terms:
3.0625 + -3.5v + v2 = -1.666666667 + 3.0625

Combine like terms: -1.666666667 + 3.0625 = 1.395833333
3.0625 + -3.5v + v2 = 1.395833333

Factor a perfect square on the left side:
(v + -1.75)(v + -1.75) = 1.395833333

Calculate the square root of the right side: 1.181453906

Break this problem into two subproblems by setting 
(v + -1.75) equal to 1.181453906 and -1.181453906.

Subproblem 1

v + -1.75 = 1.181453906 Simplifying v + -1.75 = 1.181453906 Reorder the terms: -1.75 + v = 1.181453906 Solving -1.75 + v = 1.181453906 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + v = 1.181453906 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + v = 1.181453906 + 1.75 v = 1.181453906 + 1.75 Combine like terms: 1.181453906 + 1.75 = 2.931453906 v = 2.931453906 Simplifying v = 2.931453906

Subproblem 2

v + -1.75 = -1.181453906 Simplifying v + -1.75 = -1.181453906 Reorder the terms: -1.75 + v = -1.181453906 Solving -1.75 + v = -1.181453906 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + v = -1.181453906 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + v = -1.181453906 + 1.75 v = -1.181453906 + 1.75 Combine like terms: -1.181453906 + 1.75 = 0.568546094 v = 0.568546094 Simplifying v = 0.568546094

Solution

The solution to the problem is based on the solutions from the subproblems. v = {2.931453906, 0.568546094}

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