-2h^2-2h=0

Solution for -2h^2-2h=0 equation:

Simplifying
-2h2 + -2h = 0

Reorder the terms:
-2h + -2h2 = 0

Solving
-2h + -2h2 = 0

Solving for variable 'h'.

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

Ignore the factor -2.
Subproblem 1
Set the factor 'h' equal to zero and attempt to solve:

Simplifying
h = 0

Solving
h = 0

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

Simplifying
h = 0
Subproblem 2
Set the factor '(1 + h)' equal to zero and attempt to solve:

Simplifying
1 + h = 0

Solving
1 + h = 0

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

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

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

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

Simplifying
h = -1
Solution
h = {0, -1}