Question

Pls help I am stuck, or having a brain fart I cant tell yet.

Answer 1

-4r³s -3r² +2rs -5

Explanation:

The powers of r in each of the terms from left to right are ...

3, 1, 0, 2

Arranging these in descending order gives the sequence of terms ...

-4r³s -3r² +2rs -5