-8y^2-12y-4=0

Solution for -8y^2-12y-4=0 equation:

Simplifying
-8y2 + -12y + -4 = 0

Reorder the terms:
-4 + -12y + -8y2 = 0

Solving
-4 + -12y + -8y2 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '-4'.
-4(1 + 3y + 2y2) = 0

Factor a trinomial.
-4((1 + y)(1 + 2y)) = 0

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

Simplifying
1 + y = 0

Solving
1 + y = 0

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

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

Combine like terms: 1 + -1 = 0
0 + y = 0 + -1
y = 0 + -1

Combine like terms: 0 + -1 = -1
y = -1

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

Simplifying
1 + 2y = 0

Solving
1 + 2y = 0

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

Add '-1' to each side of the equation.
1 + -1 + 2y = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 2y = 0 + -1
2y = 0 + -1

Combine like terms: 0 + -1 = -1
2y = -1

Divide each side by '2'.
y = -0.5

Simplifying
y = -0.5
Solution
y = {-1, -0.5}