(W+5)(W+5)-80=0

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Solution for (W+5)(W+5)-80=0 equation:


Simplifying
(W + 5)(W + 5) + -80 = 0

Reorder the terms:
(5 + W)(W + 5) + -80 = 0

Reorder the terms:
(5 + W)(5 + W) + -80 = 0

Multiply (5 + W) * (5 + W)
(5(5 + W) + W(5 + W)) + -80 = 0
((5 * 5 + W * 5) + W(5 + W)) + -80 = 0
((25 + 5W) + W(5 + W)) + -80 = 0
(25 + 5W + (5 * W + W * W)) + -80 = 0
(25 + 5W + (5W + W2)) + -80 = 0

Combine like terms: 5W + 5W = 10W
(25 + 10W + W2) + -80 = 0

Reorder the terms:
25 + -80 + 10W + W2 = 0

Combine like terms: 25 + -80 = -55
-55 + 10W + W2 = 0

Solving
-55 + 10W + W2 = 0

Solving for variable 'W'.

Begin completing the square.

Move the constant term to the right:

Add '55' to each side of the equation.
-55 + 10W + 55 + W2 = 0 + 55

Reorder the terms:
-55 + 55 + 10W + W2 = 0 + 55

Combine like terms: -55 + 55 = 0
0 + 10W + W2 = 0 + 55
10W + W2 = 0 + 55

Combine like terms: 0 + 55 = 55
10W + W2 = 55

The W term is 10W.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10W + 25 + W2 = 55 + 25

Reorder the terms:
25 + 10W + W2 = 55 + 25

Combine like terms: 55 + 25 = 80
25 + 10W + W2 = 80

Factor a perfect square on the left side:
(W + 5)(W + 5) = 80

Calculate the square root of the right side: 8.94427191

Break this problem into two subproblems by setting 
(W + 5) equal to 8.94427191 and -8.94427191.

Subproblem 1

W + 5 = 8.94427191 Simplifying W + 5 = 8.94427191 Reorder the terms: 5 + W = 8.94427191 Solving 5 + W = 8.94427191 Solving for variable 'W'. Move all terms containing W to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + W = 8.94427191 + -5 Combine like terms: 5 + -5 = 0 0 + W = 8.94427191 + -5 W = 8.94427191 + -5 Combine like terms: 8.94427191 + -5 = 3.94427191 W = 3.94427191 Simplifying W = 3.94427191

Subproblem 2

W + 5 = -8.94427191 Simplifying W + 5 = -8.94427191 Reorder the terms: 5 + W = -8.94427191 Solving 5 + W = -8.94427191 Solving for variable 'W'. Move all terms containing W to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + W = -8.94427191 + -5 Combine like terms: 5 + -5 = 0 0 + W = -8.94427191 + -5 W = -8.94427191 + -5 Combine like terms: -8.94427191 + -5 = -13.94427191 W = -13.94427191 Simplifying W = -13.94427191

Solution

The solution to the problem is based on the solutions from the subproblems. W = {3.94427191, -13.94427191}

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