Question

Question 83 (vii)

Multiply the following:

7pqr, (p - q + r)

Answer 1

We have, 7 pqr and (p - q + r)
$\therefore 7pqr\times (p-q+r)=7pqr\times p-7pqr\times q+7pqr\times r=7p^{2}qr-7p{q}^{2}r+7pq{r}^2$