64=w(w-4)

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Solution for 64=w(w-4) equation:


Simplifying
64 = w(w + -4)

Reorder the terms:
64 = w(-4 + w)
64 = (-4 * w + w * w)
64 = (-4w + w2)

Solving
64 = -4w + w2

Solving for variable 'w'.

Reorder the terms:
64 + 4w + -1w2 = -4w + 4w + w2 + -1w2

Combine like terms: -4w + 4w = 0
64 + 4w + -1w2 = 0 + w2 + -1w2
64 + 4w + -1w2 = w2 + -1w2

Combine like terms: w2 + -1w2 = 0
64 + 4w + -1w2 = 0

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

Divide each side by '-1'.
-64 + -4w + w2 = 0

Move the constant term to the right:

Add '64' to each side of the equation.
-64 + -4w + 64 + w2 = 0 + 64

Reorder the terms:
-64 + 64 + -4w + w2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + -4w + w2 = 0 + 64
-4w + w2 = 0 + 64

Combine like terms: 0 + 64 = 64
-4w + w2 = 64

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 = 64 + 4

Reorder the terms:
4 + -4w + w2 = 64 + 4

Combine like terms: 64 + 4 = 68
4 + -4w + w2 = 68

Factor a perfect square on the left side:
(w + -2)(w + -2) = 68

Calculate the square root of the right side: 8.246211251

Break this problem into two subproblems by setting 
(w + -2) equal to 8.246211251 and -8.246211251.

Subproblem 1

w + -2 = 8.246211251 Simplifying w + -2 = 8.246211251 Reorder the terms: -2 + w = 8.246211251 Solving -2 + w = 8.246211251 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 = 8.246211251 + 2 Combine like terms: -2 + 2 = 0 0 + w = 8.246211251 + 2 w = 8.246211251 + 2 Combine like terms: 8.246211251 + 2 = 10.246211251 w = 10.246211251 Simplifying w = 10.246211251

Subproblem 2

w + -2 = -8.246211251 Simplifying w + -2 = -8.246211251 Reorder the terms: -2 + w = -8.246211251 Solving -2 + w = -8.246211251 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 = -8.246211251 + 2 Combine like terms: -2 + 2 = 0 0 + w = -8.246211251 + 2 w = -8.246211251 + 2 Combine like terms: -8.246211251 + 2 = -6.246211251 w = -6.246211251 Simplifying w = -6.246211251

Solution

The solution to the problem is based on the solutions from the subproblems. w = {10.246211251, -6.246211251}

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