12r^2+20r+3=0

Solution for 12r^2+20r+3=0 equation:

Simplifying
12r2 + 20r + 3 = 0

Reorder the terms:
3 + 20r + 12r2 = 0

Solving
3 + 20r + 12r2 = 0

Solving for variable 'r'.

Factor a trinomial.
(3 + 2r)(1 + 6r) = 0

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

Simplifying
3 + 2r = 0

Solving
3 + 2r = 0

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

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

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

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

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

Simplifying
r = -1.5
Subproblem 2
Set the factor '(1 + 6r)' equal to zero and attempt to solve:

Simplifying
1 + 6r = 0

Solving
1 + 6r = 0

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

Add '-1' to each side of the equation.
1 + -1 + 6r = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 6r = 0 + -1
6r = 0 + -1

Combine like terms: 0 + -1 = -1
6r = -1

Divide each side by '6'.
r = -0.1666666667

Simplifying
r = -0.1666666667
Solution
r = {-1.5, -0.1666666667}