w^2+2w-39=0

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Solution for w^2+2w-39=0 equation:


Simplifying
w2 + 2w + -39 = 0

Reorder the terms:
-39 + 2w + w2 = 0

Solving
-39 + 2w + w2 = 0

Solving for variable 'w'.

Begin completing the square.

Move the constant term to the right:

Add '39' to each side of the equation.
-39 + 2w + 39 + w2 = 0 + 39

Reorder the terms:
-39 + 39 + 2w + w2 = 0 + 39

Combine like terms: -39 + 39 = 0
0 + 2w + w2 = 0 + 39
2w + w2 = 0 + 39

Combine like terms: 0 + 39 = 39
2w + w2 = 39

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

Add '1' to each side of the equation.
2w + 1 + w2 = 39 + 1

Reorder the terms:
1 + 2w + w2 = 39 + 1

Combine like terms: 39 + 1 = 40
1 + 2w + w2 = 40

Factor a perfect square on the left side:
(w + 1)(w + 1) = 40

Calculate the square root of the right side: 6.32455532

Break this problem into two subproblems by setting 
(w + 1) equal to 6.32455532 and -6.32455532.

Subproblem 1

w + 1 = 6.32455532 Simplifying w + 1 = 6.32455532 Reorder the terms: 1 + w = 6.32455532 Solving 1 + w = 6.32455532 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = 6.32455532 + -1 Combine like terms: 1 + -1 = 0 0 + w = 6.32455532 + -1 w = 6.32455532 + -1 Combine like terms: 6.32455532 + -1 = 5.32455532 w = 5.32455532 Simplifying w = 5.32455532

Subproblem 2

w + 1 = -6.32455532 Simplifying w + 1 = -6.32455532 Reorder the terms: 1 + w = -6.32455532 Solving 1 + w = -6.32455532 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = -6.32455532 + -1 Combine like terms: 1 + -1 = 0 0 + w = -6.32455532 + -1 w = -6.32455532 + -1 Combine like terms: -6.32455532 + -1 = -7.32455532 w = -7.32455532 Simplifying w = -7.32455532

Solution

The solution to the problem is based on the solutions from the subproblems. w = {5.32455532, -7.32455532}

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