-v^2+3v+30=0

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Solution for -v^2+3v+30=0 equation:


Simplifying
-1v2 + 3v + 30 = 0

Reorder the terms:
30 + 3v + -1v2 = 0

Solving
30 + 3v + -1v2 = 0

Solving for variable 'v'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-30 + -3v + v2 = 0

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + -3v + 30 + v2 = 0 + 30

Reorder the terms:
-30 + 30 + -3v + v2 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + -3v + v2 = 0 + 30
-3v + v2 = 0 + 30

Combine like terms: 0 + 30 = 30
-3v + v2 = 30

The v term is -3v.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3v + 2.25 + v2 = 30 + 2.25

Reorder the terms:
2.25 + -3v + v2 = 30 + 2.25

Combine like terms: 30 + 2.25 = 32.25
2.25 + -3v + v2 = 32.25

Factor a perfect square on the left side:
(v + -1.5)(v + -1.5) = 32.25

Calculate the square root of the right side: 5.678908346

Break this problem into two subproblems by setting 
(v + -1.5) equal to 5.678908346 and -5.678908346.

Subproblem 1

v + -1.5 = 5.678908346 Simplifying v + -1.5 = 5.678908346 Reorder the terms: -1.5 + v = 5.678908346 Solving -1.5 + v = 5.678908346 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + v = 5.678908346 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + v = 5.678908346 + 1.5 v = 5.678908346 + 1.5 Combine like terms: 5.678908346 + 1.5 = 7.178908346 v = 7.178908346 Simplifying v = 7.178908346

Subproblem 2

v + -1.5 = -5.678908346 Simplifying v + -1.5 = -5.678908346 Reorder the terms: -1.5 + v = -5.678908346 Solving -1.5 + v = -5.678908346 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + v = -5.678908346 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + v = -5.678908346 + 1.5 v = -5.678908346 + 1.5 Combine like terms: -5.678908346 + 1.5 = -4.178908346 v = -4.178908346 Simplifying v = -4.178908346

Solution

The solution to the problem is based on the solutions from the subproblems. v = {7.178908346, -4.178908346}

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