4c^2+12c=-9

Solution for 4c^2+12c=-9 equation:

Simplifying
4c2 + 12c = -9

Reorder the terms:
12c + 4c2 = -9

Solving
12c + 4c2 = -9

Solving for variable 'c'.

Reorder the terms:
9 + 12c + 4c2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + 12c + 4c2 = 0

Factor a trinomial.
(3 + 2c)(3 + 2c) = 0

Subproblem 1
Set the factor '(3 + 2c)' equal to zero and attempt to solve:

Simplifying
3 + 2c = 0

Solving
3 + 2c = 0

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

Add '-3' to each side of the equation.
3 + -3 + 2c = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 2c = 0 + -3
2c = 0 + -3

Combine like terms: 0 + -3 = -3
2c = -3

Divide each side by '2'.
c = -1.5

Simplifying
c = -1.5
Subproblem 2
Set the factor '(3 + 2c)' equal to zero and attempt to solve:

Simplifying
3 + 2c = 0

Solving
3 + 2c = 0

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

Add '-3' to each side of the equation.
3 + -3 + 2c = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 2c = 0 + -3
2c = 0 + -3

Combine like terms: 0 + -3 = -3
2c = -3

Divide each side by '2'.
c = -1.5

Simplifying
c = -1.5
Solution
c = {-1.5, -1.5}