21w+36=-3w^2

Solution for 21w+36=-3w^2 equation:

Simplifying
21w + 36 = -3w2

Reorder the terms:
36 + 21w = -3w2

Solving
36 + 21w = -3w2

Solving for variable 'w'.

Combine like terms: -3w2 + 3w2 = 0
36 + 21w + 3w2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(12 + 7w + w2) = 0

Factor a trinomial.
3((4 + w)(3 + w)) = 0

Ignore the factor 3.
Subproblem 1
Set the factor '(4 + w)' equal to zero and attempt to solve:

Simplifying
4 + w = 0

Solving
4 + w = 0

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 = 0 + -4

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

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

Simplifying
w = -4
Subproblem 2
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
Solution
w = {-4, -3}