v(8v-25)=-9

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Solution for v(8v-25)=-9 equation:


Simplifying
v(8v + -25) = -9

Reorder the terms:
v(-25 + 8v) = -9
(-25 * v + 8v * v) = -9
(-25v + 8v2) = -9

Solving
-25v + 8v2 = -9

Solving for variable 'v'.

Reorder the terms:
9 + -25v + 8v2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + -25v + 8v2 = 0

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

Divide each side by '8'.
1.125 + -3.125v + v2 = 0

Move the constant term to the right:

Add '-1.125' to each side of the equation.
1.125 + -3.125v + -1.125 + v2 = 0 + -1.125

Reorder the terms:
1.125 + -1.125 + -3.125v + v2 = 0 + -1.125

Combine like terms: 1.125 + -1.125 = 0.000
0.000 + -3.125v + v2 = 0 + -1.125
-3.125v + v2 = 0 + -1.125

Combine like terms: 0 + -1.125 = -1.125
-3.125v + v2 = -1.125

The v term is -3.125v.  Take half its coefficient (-1.5625).
Square it (2.44140625) and add it to both sides.

Add '2.44140625' to each side of the equation.
-3.125v + 2.44140625 + v2 = -1.125 + 2.44140625

Reorder the terms:
2.44140625 + -3.125v + v2 = -1.125 + 2.44140625

Combine like terms: -1.125 + 2.44140625 = 1.31640625
2.44140625 + -3.125v + v2 = 1.31640625

Factor a perfect square on the left side:
(v + -1.5625)(v + -1.5625) = 1.31640625

Calculate the square root of the right side: 1.147347484

Break this problem into two subproblems by setting 
(v + -1.5625) equal to 1.147347484 and -1.147347484.

Subproblem 1

v + -1.5625 = 1.147347484 Simplifying v + -1.5625 = 1.147347484 Reorder the terms: -1.5625 + v = 1.147347484 Solving -1.5625 + v = 1.147347484 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.5625' to each side of the equation. -1.5625 + 1.5625 + v = 1.147347484 + 1.5625 Combine like terms: -1.5625 + 1.5625 = 0.0000 0.0000 + v = 1.147347484 + 1.5625 v = 1.147347484 + 1.5625 Combine like terms: 1.147347484 + 1.5625 = 2.709847484 v = 2.709847484 Simplifying v = 2.709847484

Subproblem 2

v + -1.5625 = -1.147347484 Simplifying v + -1.5625 = -1.147347484 Reorder the terms: -1.5625 + v = -1.147347484 Solving -1.5625 + v = -1.147347484 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.5625' to each side of the equation. -1.5625 + 1.5625 + v = -1.147347484 + 1.5625 Combine like terms: -1.5625 + 1.5625 = 0.0000 0.0000 + v = -1.147347484 + 1.5625 v = -1.147347484 + 1.5625 Combine like terms: -1.147347484 + 1.5625 = 0.415152516 v = 0.415152516 Simplifying v = 0.415152516

Solution

The solution to the problem is based on the solutions from the subproblems. v = {2.709847484, 0.415152516}

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