w^2-4w-172=0

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Solution for w^2-4w-172=0 equation:


Simplifying
w2 + -4w + -172 = 0

Reorder the terms:
-172 + -4w + w2 = 0

Solving
-172 + -4w + w2 = 0

Solving for variable 'w'.

Begin completing the square.

Move the constant term to the right:

Add '172' to each side of the equation.
-172 + -4w + 172 + w2 = 0 + 172

Reorder the terms:
-172 + 172 + -4w + w2 = 0 + 172

Combine like terms: -172 + 172 = 0
0 + -4w + w2 = 0 + 172
-4w + w2 = 0 + 172

Combine like terms: 0 + 172 = 172
-4w + w2 = 172

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 = 172 + 4

Reorder the terms:
4 + -4w + w2 = 172 + 4

Combine like terms: 172 + 4 = 176
4 + -4w + w2 = 176

Factor a perfect square on the left side:
(w + -2)(w + -2) = 176

Calculate the square root of the right side: 13.266499161

Break this problem into two subproblems by setting 
(w + -2) equal to 13.266499161 and -13.266499161.

Subproblem 1

w + -2 = 13.266499161 Simplifying w + -2 = 13.266499161 Reorder the terms: -2 + w = 13.266499161 Solving -2 + w = 13.266499161 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 = 13.266499161 + 2 Combine like terms: -2 + 2 = 0 0 + w = 13.266499161 + 2 w = 13.266499161 + 2 Combine like terms: 13.266499161 + 2 = 15.266499161 w = 15.266499161 Simplifying w = 15.266499161

Subproblem 2

w + -2 = -13.266499161 Simplifying w + -2 = -13.266499161 Reorder the terms: -2 + w = -13.266499161 Solving -2 + w = -13.266499161 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 = -13.266499161 + 2 Combine like terms: -2 + 2 = 0 0 + w = -13.266499161 + 2 w = -13.266499161 + 2 Combine like terms: -13.266499161 + 2 = -11.266499161 w = -11.266499161 Simplifying w = -11.266499161

Solution

The solution to the problem is based on the solutions from the subproblems. w = {15.266499161, -11.266499161}

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