9h^2-20=-4

Solution for 9h^2-20=-4 equation:

Simplifying
9h2 + -20 = -4

Reorder the terms:
-20 + 9h2 = -4

Solving
-20 + 9h2 = -4

Solving for variable 'h'.

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

Add '20' to each side of the equation.
-20 + 20 + 9h2 = -4 + 20

Combine like terms: -20 + 20 = 0
0 + 9h2 = -4 + 20
9h2 = -4 + 20

Combine like terms: -4 + 20 = 16
9h2 = 16

Divide each side by '9'.
h2 = 1.777777778

Simplifying
h2 = 1.777777778

Take the square root of each side:
h = {-1.333333333, 1.333333333}