-5v^2+36v+49=0

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Solution for -5v^2+36v+49=0 equation:


Simplifying
-5v2 + 36v + 49 = 0

Reorder the terms:
49 + 36v + -5v2 = 0

Solving
49 + 36v + -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'.
-9.8 + -7.2v + v2 = 0

Move the constant term to the right:

Add '9.8' to each side of the equation.
-9.8 + -7.2v + 9.8 + v2 = 0 + 9.8

Reorder the terms:
-9.8 + 9.8 + -7.2v + v2 = 0 + 9.8

Combine like terms: -9.8 + 9.8 = 0.0
0.0 + -7.2v + v2 = 0 + 9.8
-7.2v + v2 = 0 + 9.8

Combine like terms: 0 + 9.8 = 9.8
-7.2v + v2 = 9.8

The v term is -7.2v.  Take half its coefficient (-3.6).
Square it (12.96) and add it to both sides.

Add '12.96' to each side of the equation.
-7.2v + 12.96 + v2 = 9.8 + 12.96

Reorder the terms:
12.96 + -7.2v + v2 = 9.8 + 12.96

Combine like terms: 9.8 + 12.96 = 22.76
12.96 + -7.2v + v2 = 22.76

Factor a perfect square on the left side:
(v + -3.6)(v + -3.6) = 22.76

Calculate the square root of the right side: 4.770744177

Break this problem into two subproblems by setting 
(v + -3.6) equal to 4.770744177 and -4.770744177.

Subproblem 1

v + -3.6 = 4.770744177 Simplifying v + -3.6 = 4.770744177 Reorder the terms: -3.6 + v = 4.770744177 Solving -3.6 + v = 4.770744177 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '3.6' to each side of the equation. -3.6 + 3.6 + v = 4.770744177 + 3.6 Combine like terms: -3.6 + 3.6 = 0.0 0.0 + v = 4.770744177 + 3.6 v = 4.770744177 + 3.6 Combine like terms: 4.770744177 + 3.6 = 8.370744177 v = 8.370744177 Simplifying v = 8.370744177

Subproblem 2

v + -3.6 = -4.770744177 Simplifying v + -3.6 = -4.770744177 Reorder the terms: -3.6 + v = -4.770744177 Solving -3.6 + v = -4.770744177 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '3.6' to each side of the equation. -3.6 + 3.6 + v = -4.770744177 + 3.6 Combine like terms: -3.6 + 3.6 = 0.0 0.0 + v = -4.770744177 + 3.6 v = -4.770744177 + 3.6 Combine like terms: -4.770744177 + 3.6 = -1.170744177 v = -1.170744177 Simplifying v = -1.170744177

Solution

The solution to the problem is based on the solutions from the subproblems. v = {8.370744177, -1.170744177}

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