Use Descartes' Rule of Signs to Determine the Possible Number $$P ( x ) = - 5 x ^ { 4 } + 4 x ^ { 3 } - 7 x ^ { 2 } + 5 x - 4$$

question 33

Multiple Choice

Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative
real zeros for the function.
- $$P ( x ) = - 5 x ^ { 4 } + 4 x ^ { 3 } - 7 x ^ { 2 } + 5 x - 4$$

• A) 0 , 2, or 4 positive; 0 , 2 , or 4 negative
• B) 0 or 2 positive; 0,2 , or 4 negative
• C) 0 or 2 positive; 0 negative
• D) 0,2 , or 4 positive; 0 negative

---

Definitions:

Kohlrabi

A vegetable in the cabbage family, with a bulbous stem that tastes similar to broccoli stems but sweeter. It can be eaten raw or cooked.

Adaptations

The process by which a species becomes fitted to its environment; it is the result of natural selection acting upon heritable variation.

Evolutionary Modifications

Changes in an organism's genetic makeup over time, leading to adaptations and the emergence of new species through natural selection and other evolutionary processes.

Vestigial Structures

Anatomical features or behaviors that have lost all or most of their original function in a species through evolution.