Question

PLZ HELP FOR BRAINLIEST!!

Answer 1

C

Using Descartes' rule of signs

look for the number of sign changes in f(x)

+ / + / - / -

There is 1 sign change hence 1 positive zero

f(-x) = -x³ + x² + 8x - 8

look for the number of sign changes in f(- x)

- / + / + / -

there are 2 sign changes hence 2 possible negative zeros