v^2-2v-49=0

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Solution for v^2-2v-49=0 equation:


Simplifying
v2 + -2v + -49 = 0

Reorder the terms:
-49 + -2v + v2 = 0

Solving
-49 + -2v + v2 = 0

Solving for variable 'v'.

Begin completing the square.

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + -2v + 49 + v2 = 0 + 49

Reorder the terms:
-49 + 49 + -2v + v2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + -2v + v2 = 0 + 49
-2v + v2 = 0 + 49

Combine like terms: 0 + 49 = 49
-2v + v2 = 49

The v term is -2v.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2v + 1 + v2 = 49 + 1

Reorder the terms:
1 + -2v + v2 = 49 + 1

Combine like terms: 49 + 1 = 50
1 + -2v + v2 = 50

Factor a perfect square on the left side:
(v + -1)(v + -1) = 50

Calculate the square root of the right side: 7.071067812

Break this problem into two subproblems by setting 
(v + -1) equal to 7.071067812 and -7.071067812.

Subproblem 1

v + -1 = 7.071067812 Simplifying v + -1 = 7.071067812 Reorder the terms: -1 + v = 7.071067812 Solving -1 + v = 7.071067812 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + v = 7.071067812 + 1 Combine like terms: -1 + 1 = 0 0 + v = 7.071067812 + 1 v = 7.071067812 + 1 Combine like terms: 7.071067812 + 1 = 8.071067812 v = 8.071067812 Simplifying v = 8.071067812

Subproblem 2

v + -1 = -7.071067812 Simplifying v + -1 = -7.071067812 Reorder the terms: -1 + v = -7.071067812 Solving -1 + v = -7.071067812 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + v = -7.071067812 + 1 Combine like terms: -1 + 1 = 0 0 + v = -7.071067812 + 1 v = -7.071067812 + 1 Combine like terms: -7.071067812 + 1 = -6.071067812 v = -6.071067812 Simplifying v = -6.071067812

Solution

The solution to the problem is based on the solutions from the subproblems. v = {8.071067812, -6.071067812}

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