v^2=18v-23

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Solution for v^2=18v-23 equation:


Simplifying
v2 = 18v + -23

Reorder the terms:
v2 = -23 + 18v

Solving
v2 = -23 + 18v

Solving for variable 'v'.

Reorder the terms:
23 + -18v + v2 = -23 + 18v + 23 + -18v

Reorder the terms:
23 + -18v + v2 = -23 + 23 + 18v + -18v

Combine like terms: -23 + 23 = 0
23 + -18v + v2 = 0 + 18v + -18v
23 + -18v + v2 = 18v + -18v

Combine like terms: 18v + -18v = 0
23 + -18v + v2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-23' to each side of the equation.
23 + -18v + -23 + v2 = 0 + -23

Reorder the terms:
23 + -23 + -18v + v2 = 0 + -23

Combine like terms: 23 + -23 = 0
0 + -18v + v2 = 0 + -23
-18v + v2 = 0 + -23

Combine like terms: 0 + -23 = -23
-18v + v2 = -23

The v term is -18v.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18v + 81 + v2 = -23 + 81

Reorder the terms:
81 + -18v + v2 = -23 + 81

Combine like terms: -23 + 81 = 58
81 + -18v + v2 = 58

Factor a perfect square on the left side:
(v + -9)(v + -9) = 58

Calculate the square root of the right side: 7.615773106

Break this problem into two subproblems by setting 
(v + -9) equal to 7.615773106 and -7.615773106.

Subproblem 1

v + -9 = 7.615773106 Simplifying v + -9 = 7.615773106 Reorder the terms: -9 + v = 7.615773106 Solving -9 + v = 7.615773106 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + v = 7.615773106 + 9 Combine like terms: -9 + 9 = 0 0 + v = 7.615773106 + 9 v = 7.615773106 + 9 Combine like terms: 7.615773106 + 9 = 16.615773106 v = 16.615773106 Simplifying v = 16.615773106

Subproblem 2

v + -9 = -7.615773106 Simplifying v + -9 = -7.615773106 Reorder the terms: -9 + v = -7.615773106 Solving -9 + v = -7.615773106 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + v = -7.615773106 + 9 Combine like terms: -9 + 9 = 0 0 + v = -7.615773106 + 9 v = -7.615773106 + 9 Combine like terms: -7.615773106 + 9 = 1.384226894 v = 1.384226894 Simplifying v = 1.384226894

Solution

The solution to the problem is based on the solutions from the subproblems. v = {16.615773106, 1.384226894}

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