0=w^2-1w-28

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Solution for 0=w^2-1w-28 equation:


Simplifying
0 = w2 + -1w + -28

Reorder the terms:
0 = -28 + -1w + w2

Solving
0 = -28 + -1w + w2

Solving for variable 'w'.

Combine like terms: 0 + 28 = 28
28 + w + -1w2 = -28 + -1w + w2 + 28 + w + -1w2

Reorder the terms:
28 + w + -1w2 = -28 + 28 + -1w + w + w2 + -1w2

Combine like terms: -28 + 28 = 0
28 + w + -1w2 = 0 + -1w + w + w2 + -1w2
28 + w + -1w2 = -1w + w + w2 + -1w2

Combine like terms: -1w + w = 0
28 + w + -1w2 = 0 + w2 + -1w2
28 + w + -1w2 = w2 + -1w2

Combine like terms: w2 + -1w2 = 0
28 + w + -1w2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-28 + -1w + w2 = 0

Move the constant term to the right:

Add '28' to each side of the equation.
-28 + -1w + 28 + w2 = 0 + 28

Reorder the terms:
-28 + 28 + -1w + w2 = 0 + 28

Combine like terms: -28 + 28 = 0
0 + -1w + w2 = 0 + 28
-1w + w2 = 0 + 28

Combine like terms: 0 + 28 = 28
-1w + w2 = 28

The w term is w.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1w + 0.25 + w2 = 28 + 0.25

Reorder the terms:
0.25 + -1w + w2 = 28 + 0.25

Combine like terms: 28 + 0.25 = 28.25
0.25 + -1w + w2 = 28.25

Factor a perfect square on the left side:
(w + 0.5)(w + 0.5) = 28.25

Calculate the square root of the right side: 5.315072906

Break this problem into two subproblems by setting 
(w + 0.5) equal to 5.315072906 and -5.315072906.

Subproblem 1

w + 0.5 = 5.315072906 Simplifying w + 0.5 = 5.315072906 Reorder the terms: 0.5 + w = 5.315072906 Solving 0.5 + w = 5.315072906 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + w = 5.315072906 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + w = 5.315072906 + -0.5 w = 5.315072906 + -0.5 Combine like terms: 5.315072906 + -0.5 = 4.815072906 w = 4.815072906 Simplifying w = 4.815072906

Subproblem 2

w + 0.5 = -5.315072906 Simplifying w + 0.5 = -5.315072906 Reorder the terms: 0.5 + w = -5.315072906 Solving 0.5 + w = -5.315072906 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + w = -5.315072906 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + w = -5.315072906 + -0.5 w = -5.315072906 + -0.5 Combine like terms: -5.315072906 + -0.5 = -5.815072906 w = -5.815072906 Simplifying w = -5.815072906

Solution

The solution to the problem is based on the solutions from the subproblems. w = {4.815072906, -5.815072906}

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