w^2+20w=165

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Solution for w^2+20w=165 equation:


Simplifying
w2 + 20w = 165

Reorder the terms:
20w + w2 = 165

Solving
20w + w2 = 165

Solving for variable 'w'.

Reorder the terms:
-165 + 20w + w2 = 165 + -165

Combine like terms: 165 + -165 = 0
-165 + 20w + w2 = 0

Begin completing the square.

Move the constant term to the right:

Add '165' to each side of the equation.
-165 + 20w + 165 + w2 = 0 + 165

Reorder the terms:
-165 + 165 + 20w + w2 = 0 + 165

Combine like terms: -165 + 165 = 0
0 + 20w + w2 = 0 + 165
20w + w2 = 0 + 165

Combine like terms: 0 + 165 = 165
20w + w2 = 165

The w term is 20w.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20w + 100 + w2 = 165 + 100

Reorder the terms:
100 + 20w + w2 = 165 + 100

Combine like terms: 165 + 100 = 265
100 + 20w + w2 = 265

Factor a perfect square on the left side:
(w + 10)(w + 10) = 265

Calculate the square root of the right side: 16.278820596

Break this problem into two subproblems by setting 
(w + 10) equal to 16.278820596 and -16.278820596.

Subproblem 1

w + 10 = 16.278820596 Simplifying w + 10 = 16.278820596 Reorder the terms: 10 + w = 16.278820596 Solving 10 + w = 16.278820596 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + w = 16.278820596 + -10 Combine like terms: 10 + -10 = 0 0 + w = 16.278820596 + -10 w = 16.278820596 + -10 Combine like terms: 16.278820596 + -10 = 6.278820596 w = 6.278820596 Simplifying w = 6.278820596

Subproblem 2

w + 10 = -16.278820596 Simplifying w + 10 = -16.278820596 Reorder the terms: 10 + w = -16.278820596 Solving 10 + w = -16.278820596 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + w = -16.278820596 + -10 Combine like terms: 10 + -10 = 0 0 + w = -16.278820596 + -10 w = -16.278820596 + -10 Combine like terms: -16.278820596 + -10 = -26.278820596 w = -26.278820596 Simplifying w = -26.278820596

Solution

The solution to the problem is based on the solutions from the subproblems. w = {6.278820596, -26.278820596}

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