5v^2-7v-53=0

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Solution for 5v^2-7v-53=0 equation:


Simplifying
5v2 + -7v + -53 = 0

Reorder the terms:
-53 + -7v + 5v2 = 0

Solving
-53 + -7v + 5v2 = 0

Solving for variable 'v'.

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

Divide each side by '5'.
-10.6 + -1.4v + v2 = 0

Move the constant term to the right:

Add '10.6' to each side of the equation.
-10.6 + -1.4v + 10.6 + v2 = 0 + 10.6

Reorder the terms:
-10.6 + 10.6 + -1.4v + v2 = 0 + 10.6

Combine like terms: -10.6 + 10.6 = 0.0
0.0 + -1.4v + v2 = 0 + 10.6
-1.4v + v2 = 0 + 10.6

Combine like terms: 0 + 10.6 = 10.6
-1.4v + v2 = 10.6

The v term is -1.4v.  Take half its coefficient (-0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
-1.4v + 0.49 + v2 = 10.6 + 0.49

Reorder the terms:
0.49 + -1.4v + v2 = 10.6 + 0.49

Combine like terms: 10.6 + 0.49 = 11.09
0.49 + -1.4v + v2 = 11.09

Factor a perfect square on the left side:
(v + -0.7)(v + -0.7) = 11.09

Calculate the square root of the right side: 3.330165161

Break this problem into two subproblems by setting 
(v + -0.7) equal to 3.330165161 and -3.330165161.

Subproblem 1

v + -0.7 = 3.330165161 Simplifying v + -0.7 = 3.330165161 Reorder the terms: -0.7 + v = 3.330165161 Solving -0.7 + v = 3.330165161 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + v = 3.330165161 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + v = 3.330165161 + 0.7 v = 3.330165161 + 0.7 Combine like terms: 3.330165161 + 0.7 = 4.030165161 v = 4.030165161 Simplifying v = 4.030165161

Subproblem 2

v + -0.7 = -3.330165161 Simplifying v + -0.7 = -3.330165161 Reorder the terms: -0.7 + v = -3.330165161 Solving -0.7 + v = -3.330165161 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + v = -3.330165161 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + v = -3.330165161 + 0.7 v = -3.330165161 + 0.7 Combine like terms: -3.330165161 + 0.7 = -2.630165161 v = -2.630165161 Simplifying v = -2.630165161

Solution

The solution to the problem is based on the solutions from the subproblems. v = {4.030165161, -2.630165161}

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