-18v=45-v^2+6v

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Solution for -18v=45-v^2+6v equation:


Simplifying
-18v = 45 + -1v2 + 6v

Reorder the terms:
-18v = 45 + 6v + -1v2

Solving
-18v = 45 + 6v + -1v2

Solving for variable 'v'.

Reorder the terms:
-45 + -18v + -6v + v2 = 45 + 6v + -1v2 + -45 + -6v + v2

Combine like terms: -18v + -6v = -24v
-45 + -24v + v2 = 45 + 6v + -1v2 + -45 + -6v + v2

Reorder the terms:
-45 + -24v + v2 = 45 + -45 + 6v + -6v + -1v2 + v2

Combine like terms: 45 + -45 = 0
-45 + -24v + v2 = 0 + 6v + -6v + -1v2 + v2
-45 + -24v + v2 = 6v + -6v + -1v2 + v2

Combine like terms: 6v + -6v = 0
-45 + -24v + v2 = 0 + -1v2 + v2
-45 + -24v + v2 = -1v2 + v2

Combine like terms: -1v2 + v2 = 0
-45 + -24v + v2 = 0

Begin completing the square.

Move the constant term to the right:

Add '45' to each side of the equation.
-45 + -24v + 45 + v2 = 0 + 45

Reorder the terms:
-45 + 45 + -24v + v2 = 0 + 45

Combine like terms: -45 + 45 = 0
0 + -24v + v2 = 0 + 45
-24v + v2 = 0 + 45

Combine like terms: 0 + 45 = 45
-24v + v2 = 45

The v term is -24v.  Take half its coefficient (-12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
-24v + 144 + v2 = 45 + 144

Reorder the terms:
144 + -24v + v2 = 45 + 144

Combine like terms: 45 + 144 = 189
144 + -24v + v2 = 189

Factor a perfect square on the left side:
(v + -12)(v + -12) = 189

Calculate the square root of the right side: 13.747727085

Break this problem into two subproblems by setting 
(v + -12) equal to 13.747727085 and -13.747727085.

Subproblem 1

v + -12 = 13.747727085 Simplifying v + -12 = 13.747727085 Reorder the terms: -12 + v = 13.747727085 Solving -12 + v = 13.747727085 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + v = 13.747727085 + 12 Combine like terms: -12 + 12 = 0 0 + v = 13.747727085 + 12 v = 13.747727085 + 12 Combine like terms: 13.747727085 + 12 = 25.747727085 v = 25.747727085 Simplifying v = 25.747727085

Subproblem 2

v + -12 = -13.747727085 Simplifying v + -12 = -13.747727085 Reorder the terms: -12 + v = -13.747727085 Solving -12 + v = -13.747727085 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + v = -13.747727085 + 12 Combine like terms: -12 + 12 = 0 0 + v = -13.747727085 + 12 v = -13.747727085 + 12 Combine like terms: -13.747727085 + 12 = -1.747727085 v = -1.747727085 Simplifying v = -1.747727085

Solution

The solution to the problem is based on the solutions from the subproblems. v = {25.747727085, -1.747727085}

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