9v^2-30v+5=0

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Solution for 9v^2-30v+5=0 equation:


Simplifying
9v2 + -30v + 5 = 0

Reorder the terms:
5 + -30v + 9v2 = 0

Solving
5 + -30v + 9v2 = 0

Solving for variable 'v'.

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

Divide each side by '9'.
0.5555555556 + -3.333333333v + v2 = 0

Move the constant term to the right:

Add '-0.5555555556' to each side of the equation.
0.5555555556 + -3.333333333v + -0.5555555556 + v2 = 0 + -0.5555555556

Reorder the terms:
0.5555555556 + -0.5555555556 + -3.333333333v + v2 = 0 + -0.5555555556

Combine like terms: 0.5555555556 + -0.5555555556 = 0.0000000000
0.0000000000 + -3.333333333v + v2 = 0 + -0.5555555556
-3.333333333v + v2 = 0 + -0.5555555556

Combine like terms: 0 + -0.5555555556 = -0.5555555556
-3.333333333v + v2 = -0.5555555556

The v term is -3.333333333v.  Take half its coefficient (-1.666666667).
Square it (2.777777779) and add it to both sides.

Add '2.777777779' to each side of the equation.
-3.333333333v + 2.777777779 + v2 = -0.5555555556 + 2.777777779

Reorder the terms:
2.777777779 + -3.333333333v + v2 = -0.5555555556 + 2.777777779

Combine like terms: -0.5555555556 + 2.777777779 = 2.2222222234
2.777777779 + -3.333333333v + v2 = 2.2222222234

Factor a perfect square on the left side:
(v + -1.666666667)(v + -1.666666667) = 2.2222222234

Calculate the square root of the right side: 1.490711985

Break this problem into two subproblems by setting 
(v + -1.666666667) equal to 1.490711985 and -1.490711985.

Subproblem 1

v + -1.666666667 = 1.490711985 Simplifying v + -1.666666667 = 1.490711985 Reorder the terms: -1.666666667 + v = 1.490711985 Solving -1.666666667 + v = 1.490711985 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.666666667' to each side of the equation. -1.666666667 + 1.666666667 + v = 1.490711985 + 1.666666667 Combine like terms: -1.666666667 + 1.666666667 = 0.000000000 0.000000000 + v = 1.490711985 + 1.666666667 v = 1.490711985 + 1.666666667 Combine like terms: 1.490711985 + 1.666666667 = 3.157378652 v = 3.157378652 Simplifying v = 3.157378652

Subproblem 2

v + -1.666666667 = -1.490711985 Simplifying v + -1.666666667 = -1.490711985 Reorder the terms: -1.666666667 + v = -1.490711985 Solving -1.666666667 + v = -1.490711985 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.666666667' to each side of the equation. -1.666666667 + 1.666666667 + v = -1.490711985 + 1.666666667 Combine like terms: -1.666666667 + 1.666666667 = 0.000000000 0.000000000 + v = -1.490711985 + 1.666666667 v = -1.490711985 + 1.666666667 Combine like terms: -1.490711985 + 1.666666667 = 0.175954682 v = 0.175954682 Simplifying v = 0.175954682

Solution

The solution to the problem is based on the solutions from the subproblems. v = {3.157378652, 0.175954682}

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