7v^2-10v=11

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Solution for 7v^2-10v=11 equation:


Simplifying
7v2 + -10v = 11

Reorder the terms:
-10v + 7v2 = 11

Solving
-10v + 7v2 = 11

Solving for variable 'v'.

Reorder the terms:
-11 + -10v + 7v2 = 11 + -11

Combine like terms: 11 + -11 = 0
-11 + -10v + 7v2 = 0

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

Divide each side by '7'.
-1.571428571 + -1.428571429v + v2 = 0

Move the constant term to the right:

Add '1.571428571' to each side of the equation.
-1.571428571 + -1.428571429v + 1.571428571 + v2 = 0 + 1.571428571

Reorder the terms:
-1.571428571 + 1.571428571 + -1.428571429v + v2 = 0 + 1.571428571

Combine like terms: -1.571428571 + 1.571428571 = 0.000000000
0.000000000 + -1.428571429v + v2 = 0 + 1.571428571
-1.428571429v + v2 = 0 + 1.571428571

Combine like terms: 0 + 1.571428571 = 1.571428571
-1.428571429v + v2 = 1.571428571

The v term is -1.428571429v.  Take half its coefficient (-0.7142857145).
Square it (0.5102040819) and add it to both sides.

Add '0.5102040819' to each side of the equation.
-1.428571429v + 0.5102040819 + v2 = 1.571428571 + 0.5102040819

Reorder the terms:
0.5102040819 + -1.428571429v + v2 = 1.571428571 + 0.5102040819

Combine like terms: 1.571428571 + 0.5102040819 = 2.0816326529
0.5102040819 + -1.428571429v + v2 = 2.0816326529

Factor a perfect square on the left side:
(v + -0.7142857145)(v + -0.7142857145) = 2.0816326529

Calculate the square root of the right side: 1.44278642

Break this problem into two subproblems by setting 
(v + -0.7142857145) equal to 1.44278642 and -1.44278642.

Subproblem 1

v + -0.7142857145 = 1.44278642 Simplifying v + -0.7142857145 = 1.44278642 Reorder the terms: -0.7142857145 + v = 1.44278642 Solving -0.7142857145 + v = 1.44278642 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.7142857145' to each side of the equation. -0.7142857145 + 0.7142857145 + v = 1.44278642 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + v = 1.44278642 + 0.7142857145 v = 1.44278642 + 0.7142857145 Combine like terms: 1.44278642 + 0.7142857145 = 2.1570721345 v = 2.1570721345 Simplifying v = 2.1570721345

Subproblem 2

v + -0.7142857145 = -1.44278642 Simplifying v + -0.7142857145 = -1.44278642 Reorder the terms: -0.7142857145 + v = -1.44278642 Solving -0.7142857145 + v = -1.44278642 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '0.7142857145' to each side of the equation. -0.7142857145 + 0.7142857145 + v = -1.44278642 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + v = -1.44278642 + 0.7142857145 v = -1.44278642 + 0.7142857145 Combine like terms: -1.44278642 + 0.7142857145 = -0.7285007055 v = -0.7285007055 Simplifying v = -0.7285007055

Solution

The solution to the problem is based on the solutions from the subproblems. v = {2.1570721345, -0.7285007055}

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