-7v(v-6)=-38

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Solution for -7v(v-6)=-38 equation:


Simplifying
-7v(v + -6) = -38

Reorder the terms:
-7v(-6 + v) = -38
(-6 * -7v + v * -7v) = -38
(42v + -7v2) = -38

Solving
42v + -7v2 = -38

Solving for variable 'v'.

Reorder the terms:
38 + 42v + -7v2 = -38 + 38

Combine like terms: -38 + 38 = 0
38 + 42v + -7v2 = 0

Begin completing the square.  Divide all terms by
-7 the coefficient of the squared term: 

Divide each side by '-7'.
-5.428571429 + -6v + v2 = 0

Move the constant term to the right:

Add '5.428571429' to each side of the equation.
-5.428571429 + -6v + 5.428571429 + v2 = 0 + 5.428571429

Reorder the terms:
-5.428571429 + 5.428571429 + -6v + v2 = 0 + 5.428571429

Combine like terms: -5.428571429 + 5.428571429 = 0.000000000
0.000000000 + -6v + v2 = 0 + 5.428571429
-6v + v2 = 0 + 5.428571429

Combine like terms: 0 + 5.428571429 = 5.428571429
-6v + v2 = 5.428571429

The v term is -6v.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6v + 9 + v2 = 5.428571429 + 9

Reorder the terms:
9 + -6v + v2 = 5.428571429 + 9

Combine like terms: 5.428571429 + 9 = 14.428571429
9 + -6v + v2 = 14.428571429

Factor a perfect square on the left side:
(v + -3)(v + -3) = 14.428571429

Calculate the square root of the right side: 3.798495943

Break this problem into two subproblems by setting 
(v + -3) equal to 3.798495943 and -3.798495943.

Subproblem 1

v + -3 = 3.798495943 Simplifying v + -3 = 3.798495943 Reorder the terms: -3 + v = 3.798495943 Solving -3 + v = 3.798495943 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + v = 3.798495943 + 3 Combine like terms: -3 + 3 = 0 0 + v = 3.798495943 + 3 v = 3.798495943 + 3 Combine like terms: 3.798495943 + 3 = 6.798495943 v = 6.798495943 Simplifying v = 6.798495943

Subproblem 2

v + -3 = -3.798495943 Simplifying v + -3 = -3.798495943 Reorder the terms: -3 + v = -3.798495943 Solving -3 + v = -3.798495943 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + v = -3.798495943 + 3 Combine like terms: -3 + 3 = 0 0 + v = -3.798495943 + 3 v = -3.798495943 + 3 Combine like terms: -3.798495943 + 3 = -0.798495943 v = -0.798495943 Simplifying v = -0.798495943

Solution

The solution to the problem is based on the solutions from the subproblems. v = {6.798495943, -0.798495943}

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