(7+w)-(w+7)w=-4

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Solution for (7+w)-(w+7)w=-4 equation:


Simplifying
(7 + w) + -1(w + 7) * w = -4

Remove parenthesis around (7 + w)
7 + w + -1(w + 7) * w = -4

Reorder the terms:
7 + w + -1(7 + w) * w = -4

Reorder the terms for easier multiplication:
7 + w + -1w(7 + w) = -4
7 + w + (7 * -1w + w * -1w) = -4
7 + w + (-7w + -1w2) = -4

Combine like terms: w + -7w = -6w
7 + -6w + -1w2 = -4

Solving
7 + -6w + -1w2 = -4

Solving for variable 'w'.

Reorder the terms:
7 + 4 + -6w + -1w2 = -4 + 4

Combine like terms: 7 + 4 = 11
11 + -6w + -1w2 = -4 + 4

Combine like terms: -4 + 4 = 0
11 + -6w + -1w2 = 0

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

Divide each side by '-1'.
-11 + 6w + w2 = 0

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + 6w + 11 + w2 = 0 + 11

Reorder the terms:
-11 + 11 + 6w + w2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + 6w + w2 = 0 + 11
6w + w2 = 0 + 11

Combine like terms: 0 + 11 = 11
6w + w2 = 11

The w term is 6w.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6w + 9 + w2 = 11 + 9

Reorder the terms:
9 + 6w + w2 = 11 + 9

Combine like terms: 11 + 9 = 20
9 + 6w + w2 = 20

Factor a perfect square on the left side:
(w + 3)(w + 3) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(w + 3) equal to 4.472135955 and -4.472135955.

Subproblem 1

w + 3 = 4.472135955 Simplifying w + 3 = 4.472135955 Reorder the terms: 3 + w = 4.472135955 Solving 3 + w = 4.472135955 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + w = 4.472135955 + -3 Combine like terms: 3 + -3 = 0 0 + w = 4.472135955 + -3 w = 4.472135955 + -3 Combine like terms: 4.472135955 + -3 = 1.472135955 w = 1.472135955 Simplifying w = 1.472135955

Subproblem 2

w + 3 = -4.472135955 Simplifying w + 3 = -4.472135955 Reorder the terms: 3 + w = -4.472135955 Solving 3 + w = -4.472135955 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + w = -4.472135955 + -3 Combine like terms: 3 + -3 = 0 0 + w = -4.472135955 + -3 w = -4.472135955 + -3 Combine like terms: -4.472135955 + -3 = -7.472135955 w = -7.472135955 Simplifying w = -7.472135955

Solution

The solution to the problem is based on the solutions from the subproblems. w = {1.472135955, -7.472135955}

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