-h^2-h=0

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

Simplifying
-1h2 + -1h = 0

Reorder the terms:
-1h + -1h2 = 0

Solving
-1h + -1h2 = 0

Solving for variable 'h'.

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

Ignore the factor -1.
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}