possible numbers of positive and negative real zeros of the function

Use Descartes’s Rule of Signs to determine the possible numbers of positive and negative real zeros of the function.

g(x) = 3x³ − 4x² − 19

The number of variations in sign in
g(
x) is .            Therefore, the number of real zeros of
g is .

The number of variations in sign in
g(-
x) is .               Therefore, the number of real zeros of
g is .