w(w+4)=116

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Solution for w(w+4)=116 equation:


Simplifying
w(w + 4) = 116

Reorder the terms:
w(4 + w) = 116
(4 * w + w * w) = 116
(4w + w2) = 116

Solving
4w + w2 = 116

Solving for variable 'w'.

Reorder the terms:
-116 + 4w + w2 = 116 + -116

Combine like terms: 116 + -116 = 0
-116 + 4w + w2 = 0

Begin completing the square.

Move the constant term to the right:

Add '116' to each side of the equation.
-116 + 4w + 116 + w2 = 0 + 116

Reorder the terms:
-116 + 116 + 4w + w2 = 0 + 116

Combine like terms: -116 + 116 = 0
0 + 4w + w2 = 0 + 116
4w + w2 = 0 + 116

Combine like terms: 0 + 116 = 116
4w + w2 = 116

The w term is 4w.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4w + 4 + w2 = 116 + 4

Reorder the terms:
4 + 4w + w2 = 116 + 4

Combine like terms: 116 + 4 = 120
4 + 4w + w2 = 120

Factor a perfect square on the left side:
(w + 2)(w + 2) = 120

Calculate the square root of the right side: 10.95445115

Break this problem into two subproblems by setting 
(w + 2) equal to 10.95445115 and -10.95445115.

Subproblem 1

w + 2 = 10.95445115 Simplifying w + 2 = 10.95445115 Reorder the terms: 2 + w = 10.95445115 Solving 2 + w = 10.95445115 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + w = 10.95445115 + -2 Combine like terms: 2 + -2 = 0 0 + w = 10.95445115 + -2 w = 10.95445115 + -2 Combine like terms: 10.95445115 + -2 = 8.95445115 w = 8.95445115 Simplifying w = 8.95445115

Subproblem 2

w + 2 = -10.95445115 Simplifying w + 2 = -10.95445115 Reorder the terms: 2 + w = -10.95445115 Solving 2 + w = -10.95445115 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + w = -10.95445115 + -2 Combine like terms: 2 + -2 = 0 0 + w = -10.95445115 + -2 w = -10.95445115 + -2 Combine like terms: -10.95445115 + -2 = -12.95445115 w = -12.95445115 Simplifying w = -12.95445115

Solution

The solution to the problem is based on the solutions from the subproblems. w = {8.95445115, -12.95445115}

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