(w+3)(w+5)=9

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Solution for (w+3)(w+5)=9 equation:


Simplifying
(w + 3)(w + 5) = 9

Reorder the terms:
(3 + w)(w + 5) = 9

Reorder the terms:
(3 + w)(5 + w) = 9

Multiply (3 + w) * (5 + w)
(3(5 + w) + w(5 + w)) = 9
((5 * 3 + w * 3) + w(5 + w)) = 9
((15 + 3w) + w(5 + w)) = 9
(15 + 3w + (5 * w + w * w)) = 9
(15 + 3w + (5w + w2)) = 9

Combine like terms: 3w + 5w = 8w
(15 + 8w + w2) = 9

Solving
15 + 8w + w2 = 9

Solving for variable 'w'.

Reorder the terms:
15 + -9 + 8w + w2 = 9 + -9

Combine like terms: 15 + -9 = 6
6 + 8w + w2 = 9 + -9

Combine like terms: 9 + -9 = 0
6 + 8w + w2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + 8w + -6 + w2 = 0 + -6

Reorder the terms:
6 + -6 + 8w + w2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 8w + w2 = 0 + -6
8w + w2 = 0 + -6

Combine like terms: 0 + -6 = -6
8w + w2 = -6

The w term is 8w.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8w + 16 + w2 = -6 + 16

Reorder the terms:
16 + 8w + w2 = -6 + 16

Combine like terms: -6 + 16 = 10
16 + 8w + w2 = 10

Factor a perfect square on the left side:
(w + 4)(w + 4) = 10

Calculate the square root of the right side: 3.16227766

Break this problem into two subproblems by setting 
(w + 4) equal to 3.16227766 and -3.16227766.

Subproblem 1

w + 4 = 3.16227766 Simplifying w + 4 = 3.16227766 Reorder the terms: 4 + w = 3.16227766 Solving 4 + w = 3.16227766 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + w = 3.16227766 + -4 Combine like terms: 4 + -4 = 0 0 + w = 3.16227766 + -4 w = 3.16227766 + -4 Combine like terms: 3.16227766 + -4 = -0.83772234 w = -0.83772234 Simplifying w = -0.83772234

Subproblem 2

w + 4 = -3.16227766 Simplifying w + 4 = -3.16227766 Reorder the terms: 4 + w = -3.16227766 Solving 4 + w = -3.16227766 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + w = -3.16227766 + -4 Combine like terms: 4 + -4 = 0 0 + w = -3.16227766 + -4 w = -3.16227766 + -4 Combine like terms: -3.16227766 + -4 = -7.16227766 w = -7.16227766 Simplifying w = -7.16227766

Solution

The solution to the problem is based on the solutions from the subproblems. w = {-0.83772234, -7.16227766}

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