(2w-5)w=65

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Solution for (2w-5)w=65 equation:


Simplifying
(2w + -5) * w = 65

Reorder the terms:
(-5 + 2w) * w = 65

Reorder the terms for easier multiplication:
w(-5 + 2w) = 65
(-5 * w + 2w * w) = 65
(-5w + 2w2) = 65

Solving
-5w + 2w2 = 65

Solving for variable 'w'.

Reorder the terms:
-65 + -5w + 2w2 = 65 + -65

Combine like terms: 65 + -65 = 0
-65 + -5w + 2w2 = 0

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

Divide each side by '2'.
-32.5 + -2.5w + w2 = 0

Move the constant term to the right:

Add '32.5' to each side of the equation.
-32.5 + -2.5w + 32.5 + w2 = 0 + 32.5

Reorder the terms:
-32.5 + 32.5 + -2.5w + w2 = 0 + 32.5

Combine like terms: -32.5 + 32.5 = 0.0
0.0 + -2.5w + w2 = 0 + 32.5
-2.5w + w2 = 0 + 32.5

Combine like terms: 0 + 32.5 = 32.5
-2.5w + w2 = 32.5

The w term is -2.5w.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5w + 1.5625 + w2 = 32.5 + 1.5625

Reorder the terms:
1.5625 + -2.5w + w2 = 32.5 + 1.5625

Combine like terms: 32.5 + 1.5625 = 34.0625
1.5625 + -2.5w + w2 = 34.0625

Factor a perfect square on the left side:
(w + -1.25)(w + -1.25) = 34.0625

Calculate the square root of the right side: 5.836308765

Break this problem into two subproblems by setting 
(w + -1.25) equal to 5.836308765 and -5.836308765.

Subproblem 1

w + -1.25 = 5.836308765 Simplifying w + -1.25 = 5.836308765 Reorder the terms: -1.25 + w = 5.836308765 Solving -1.25 + w = 5.836308765 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + w = 5.836308765 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + w = 5.836308765 + 1.25 w = 5.836308765 + 1.25 Combine like terms: 5.836308765 + 1.25 = 7.086308765 w = 7.086308765 Simplifying w = 7.086308765

Subproblem 2

w + -1.25 = -5.836308765 Simplifying w + -1.25 = -5.836308765 Reorder the terms: -1.25 + w = -5.836308765 Solving -1.25 + w = -5.836308765 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + w = -5.836308765 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + w = -5.836308765 + 1.25 w = -5.836308765 + 1.25 Combine like terms: -5.836308765 + 1.25 = -4.586308765 w = -4.586308765 Simplifying w = -4.586308765

Solution

The solution to the problem is based on the solutions from the subproblems. w = {7.086308765, -4.586308765}

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