(3w+7)(3+w)=0

Solution for (3w+7)(3+w)=0 equation:

Simplifying
(3w + 7)(3 + w) = 0

Reorder the terms:
(7 + 3w)(3 + w) = 0

Multiply (7 + 3w) * (3 + w)
(7(3 + w) + 3w * (3 + w)) = 0
((3 * 7 + w * 7) + 3w * (3 + w)) = 0
((21 + 7w) + 3w * (3 + w)) = 0
(21 + 7w + (3 * 3w + w * 3w)) = 0
(21 + 7w + (9w + 3w2)) = 0

Combine like terms: 7w + 9w = 16w
(21 + 16w + 3w2) = 0

Solving
21 + 16w + 3w2 = 0

Solving for variable 'w'.

Factor a trinomial.
(3 + w)(7 + 3w) = 0

Subproblem 1
Set the factor '(3 + w)' equal to zero and attempt to solve:

Simplifying
3 + w = 0

Solving
3 + w = 0

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 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + w = 0 + -3
w = 0 + -3

Combine like terms: 0 + -3 = -3
w = -3

Simplifying
w = -3
Subproblem 2
Set the factor '(7 + 3w)' equal to zero and attempt to solve:

Simplifying
7 + 3w = 0

Solving
7 + 3w = 0

Move all terms containing w to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + 3w = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 3w = 0 + -7
3w = 0 + -7

Combine like terms: 0 + -7 = -7
3w = -7

Divide each side by '3'.
w = -2.333333333

Simplifying
w = -2.333333333
Solution
w = {-3, -2.333333333}