w^2+14w-31=0

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Solution for w^2+14w-31=0 equation: 


Simplifying
w2 + 14w + -31 = 0

Reorder the terms:
-31 + 14w + w2 = 0

Solving
-31 + 14w + w2 = 0

Solving for variable 'w'.

Begin completing the square.

Move the constant term to the right:

Add '31' to each side of the equation.
-31 + 14w + 31 + w2 = 0 + 31

Reorder the terms:
-31 + 31 + 14w + w2 = 0 + 31

Combine like terms: -31 + 31 = 0
0 + 14w + w2 = 0 + 31
14w + w2 = 0 + 31

Combine like terms: 0 + 31 = 31
14w + w2 = 31

The w term is 14w.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14w + 49 + w2 = 31 + 49

Reorder the terms:
49 + 14w + w2 = 31 + 49

Combine like terms: 31 + 49 = 80
49 + 14w + w2 = 80

Factor a perfect square on the left side:
(w + 7)(w + 7) = 80

Calculate the square root of the right side: 8.94427191

Break this problem into two subproblems by setting 
(w + 7) equal to 8.94427191 and -8.94427191.


Subproblem 1
w + 7 = 8.94427191

Simplifying
w + 7 = 8.94427191

Reorder the terms:
7 + w = 8.94427191

Solving
7 + w = 8.94427191

Solving for variable 'w'.

Move all terms containing w to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + w = 8.94427191 + -7

Combine like terms: 7 + -7 = 0
0 + w = 8.94427191 + -7
w = 8.94427191 + -7

Combine like terms: 8.94427191 + -7 = 1.94427191
w = 1.94427191

Simplifying
w = 1.94427191


Subproblem 2
w + 7 = -8.94427191

Simplifying
w + 7 = -8.94427191

Reorder the terms:
7 + w = -8.94427191

Solving
7 + w = -8.94427191

Solving for variable 'w'.

Move all terms containing w to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + w = -8.94427191 + -7

Combine like terms: 7 + -7 = 0
0 + w = -8.94427191 + -7
w = -8.94427191 + -7

Combine like terms: -8.94427191 + -7 = -15.94427191
w = -15.94427191

Simplifying
w = -15.94427191


Solution
The solution to the problem is based on the solutions
from the subproblems.
w = {1.94427191, -15.94427191}

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