4h^2+5h-9=0

Solution for 4h^2+5h-9=0 equation:

Simplifying
4h2 + 5h + -9 = 0

Reorder the terms:
-9 + 5h + 4h2 = 0

Solving
-9 + 5h + 4h2 = 0

Solving for variable 'h'.

Factor a trinomial.
(-9 + -4h)(1 + -1h) = 0

Subproblem 1
Set the factor '(-9 + -4h)' equal to zero and attempt to solve:

Simplifying
-9 + -4h = 0

Solving
-9 + -4h = 0

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

Add '9' to each side of the equation.
-9 + 9 + -4h = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -4h = 0 + 9
-4h = 0 + 9

Combine like terms: 0 + 9 = 9
-4h = 9

Divide each side by '-4'.
h = -2.25

Simplifying
h = -2.25
Subproblem 2
Set the factor '(1 + -1h)' equal to zero and attempt to solve:

Simplifying
1 + -1h = 0

Solving
1 + -1h = 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 + -1h = 0 + -1

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

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

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

Simplifying
h = 1
Solution
h = {-2.25, 1}