2h^2-h-15=0

Solution for 2h^2-h-15=0 equation:

Simplifying
2h2 + -1h + -15 = 0

Reorder the terms:
-15 + -1h + 2h2 = 0

Solving
-15 + -1h + 2h2 = 0

Solving for variable 'h'.

Factor a trinomial.
(-5 + -2h)(3 + -1h) = 0

Subproblem 1
Set the factor '(-5 + -2h)' equal to zero and attempt to solve:

Simplifying
-5 + -2h = 0

Solving
-5 + -2h = 0

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

Add '5' to each side of the equation.
-5 + 5 + -2h = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -2h = 0 + 5
-2h = 0 + 5

Combine like terms: 0 + 5 = 5
-2h = 5

Divide each side by '-2'.
h = -2.5

Simplifying
h = -2.5
Subproblem 2
Set the factor '(3 + -1h)' equal to zero and attempt to solve:

Simplifying
3 + -1h = 0

Solving
3 + -1h = 0

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

Add '-3' to each side of the equation.
3 + -3 + -1h = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1h = 0 + -3
-1h = 0 + -3

Combine like terms: 0 + -3 = -3
-1h = -3

Divide each side by '-1'.
h = 3

Simplifying
h = 3
Solution
h = {-2.5, 3}