4v^2-14v-15=

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Solution for 4v^2-14v-15= equation:


Simplifying
4v2 + -14v + -15 = 0

Reorder the terms:
-15 + -14v + 4v2 = 0

Solving
-15 + -14v + 4v2 = 0

Solving for variable 'v'.

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

Divide each side by '4'.
-3.75 + -3.5v + v2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + -3.5v + 3.75 + v2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + -3.5v + v2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + -3.5v + v2 = 0 + 3.75
-3.5v + v2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
-3.5v + v2 = 3.75

The v term is -3.5v.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5v + 3.0625 + v2 = 3.75 + 3.0625

Reorder the terms:
3.0625 + -3.5v + v2 = 3.75 + 3.0625

Combine like terms: 3.75 + 3.0625 = 6.8125
3.0625 + -3.5v + v2 = 6.8125

Factor a perfect square on the left side:
(v + -1.75)(v + -1.75) = 6.8125

Calculate the square root of the right side: 2.610076627

Break this problem into two subproblems by setting 
(v + -1.75) equal to 2.610076627 and -2.610076627.

Subproblem 1

v + -1.75 = 2.610076627 Simplifying v + -1.75 = 2.610076627 Reorder the terms: -1.75 + v = 2.610076627 Solving -1.75 + v = 2.610076627 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + v = 2.610076627 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + v = 2.610076627 + 1.75 v = 2.610076627 + 1.75 Combine like terms: 2.610076627 + 1.75 = 4.360076627 v = 4.360076627 Simplifying v = 4.360076627

Subproblem 2

v + -1.75 = -2.610076627 Simplifying v + -1.75 = -2.610076627 Reorder the terms: -1.75 + v = -2.610076627 Solving -1.75 + v = -2.610076627 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + v = -2.610076627 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + v = -2.610076627 + 1.75 v = -2.610076627 + 1.75 Combine like terms: -2.610076627 + 1.75 = -0.860076627 v = -0.860076627 Simplifying v = -0.860076627

Solution

The solution to the problem is based on the solutions from the subproblems. v = {4.360076627, -0.860076627}

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