-2y=2y^2-4

Solution for -2y=2y^2-4 equation:

Simplifying
-2y = 2y2 + -4

Reorder the terms:
-2y = -4 + 2y2

Solving
-2y = -4 + 2y2

Solving for variable 'y'.

Reorder the terms:
4 + -2y + -2y2 = -4 + 2y2 + 4 + -2y2

Reorder the terms:
4 + -2y + -2y2 = -4 + 4 + 2y2 + -2y2

Combine like terms: -4 + 4 = 0
4 + -2y + -2y2 = 0 + 2y2 + -2y2
4 + -2y + -2y2 = 2y2 + -2y2

Combine like terms: 2y2 + -2y2 = 0
4 + -2y + -2y2 = 0

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

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

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

Simplifying
1 + -1y = 0

Solving
1 + -1y = 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 + -1y = 0 + -1

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

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

Divide each side by '-1'.
y = 1

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

Simplifying
2 + y = 0

Solving
2 + y = 0

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

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

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

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

Simplifying
y = -2
Solution
y = {1, -2}