Question

K) pq (r² + 1) - r (p² + q²)​

Answer 1

pqr²−p²r−q²r+pq

Explanation:

Let's simplify step-by-step.

pq(r²+1)−r(p²+q²)

Distribute:

=(pq)(r²)+(pq)(1)+−p²r+−q²r

=pqr²+pq+−p²r+−q²r

=pqr²−p²r−q²r+pq