9v^2-25=9v

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Solution for 9v^2-25=9v equation:


Simplifying
9v2 + -25 = 9v

Reorder the terms:
-25 + 9v2 = 9v

Solving
-25 + 9v2 = 9v

Solving for variable 'v'.

Reorder the terms:
-25 + -9v + 9v2 = 9v + -9v

Combine like terms: 9v + -9v = 0
-25 + -9v + 9v2 = 0

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

Divide each side by '9'.
-2.777777778 + -1v + v2 = 0

Move the constant term to the right:

Add '2.777777778' to each side of the equation.
-2.777777778 + -1v + 2.777777778 + v2 = 0 + 2.777777778

Reorder the terms:
-2.777777778 + 2.777777778 + -1v + v2 = 0 + 2.777777778

Combine like terms: -2.777777778 + 2.777777778 = 0.000000000
0.000000000 + -1v + v2 = 0 + 2.777777778
-1v + v2 = 0 + 2.777777778

Combine like terms: 0 + 2.777777778 = 2.777777778
-1v + v2 = 2.777777778

The v term is -1v.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1v + 0.25 + v2 = 2.777777778 + 0.25

Reorder the terms:
0.25 + -1v + v2 = 2.777777778 + 0.25

Combine like terms: 2.777777778 + 0.25 = 3.027777778
0.25 + -1v + v2 = 3.027777778

Factor a perfect square on the left side:
(v + -0.5)(v + -0.5) = 3.027777778

Calculate the square root of the right side: 1.740051085

Break this problem into two subproblems by setting 
(v + -0.5) equal to 1.740051085 and -1.740051085.

Subproblem 1

v + -0.5 = 1.740051085 Simplifying v + -0.5 = 1.740051085 Reorder the terms: -0.5 + v = 1.740051085 Solving -0.5 + v = 1.740051085 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + v = 1.740051085 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + v = 1.740051085 + 0.5 v = 1.740051085 + 0.5 Combine like terms: 1.740051085 + 0.5 = 2.240051085 v = 2.240051085 Simplifying v = 2.240051085

Subproblem 2

v + -0.5 = -1.740051085 Simplifying v + -0.5 = -1.740051085 Reorder the terms: -0.5 + v = -1.740051085 Solving -0.5 + v = -1.740051085 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + v = -1.740051085 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + v = -1.740051085 + 0.5 v = -1.740051085 + 0.5 Combine like terms: -1.740051085 + 0.5 = -1.240051085 v = -1.240051085 Simplifying v = -1.240051085

Solution

The solution to the problem is based on the solutions from the subproblems. v = {2.240051085, -1.240051085}

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