8v^2+7v-23=0

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Solution for 8v^2+7v-23=0 equation:


Simplifying
8v2 + 7v + -23 = 0

Reorder the terms:
-23 + 7v + 8v2 = 0

Solving
-23 + 7v + 8v2 = 0

Solving for variable 'v'.

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

Divide each side by '8'.
-2.875 + 0.875v + v2 = 0

Move the constant term to the right:

Add '2.875' to each side of the equation.
-2.875 + 0.875v + 2.875 + v2 = 0 + 2.875

Reorder the terms:
-2.875 + 2.875 + 0.875v + v2 = 0 + 2.875

Combine like terms: -2.875 + 2.875 = 0.000
0.000 + 0.875v + v2 = 0 + 2.875
0.875v + v2 = 0 + 2.875

Combine like terms: 0 + 2.875 = 2.875
0.875v + v2 = 2.875

The v term is 0.875v.  Take half its coefficient (0.4375).
Square it (0.19140625) and add it to both sides.

Add '0.19140625' to each side of the equation.
0.875v + 0.19140625 + v2 = 2.875 + 0.19140625

Reorder the terms:
0.19140625 + 0.875v + v2 = 2.875 + 0.19140625

Combine like terms: 2.875 + 0.19140625 = 3.06640625
0.19140625 + 0.875v + v2 = 3.06640625

Factor a perfect square on the left side:
(v + 0.4375)(v + 0.4375) = 3.06640625

Calculate the square root of the right side: 1.751115716

Break this problem into two subproblems by setting 
(v + 0.4375) equal to 1.751115716 and -1.751115716.

Subproblem 1

v + 0.4375 = 1.751115716 Simplifying v + 0.4375 = 1.751115716 Reorder the terms: 0.4375 + v = 1.751115716 Solving 0.4375 + v = 1.751115716 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + v = 1.751115716 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + v = 1.751115716 + -0.4375 v = 1.751115716 + -0.4375 Combine like terms: 1.751115716 + -0.4375 = 1.313615716 v = 1.313615716 Simplifying v = 1.313615716

Subproblem 2

v + 0.4375 = -1.751115716 Simplifying v + 0.4375 = -1.751115716 Reorder the terms: 0.4375 + v = -1.751115716 Solving 0.4375 + v = -1.751115716 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + v = -1.751115716 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + v = -1.751115716 + -0.4375 v = -1.751115716 + -0.4375 Combine like terms: -1.751115716 + -0.4375 = -2.188615716 v = -2.188615716 Simplifying v = -2.188615716

Solution

The solution to the problem is based on the solutions from the subproblems. v = {1.313615716, -2.188615716}

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