Question

Multiply the following :

$-7p{q}^2{r}^3,-13p^3{q}^{2}r$

Answer 1

We have to multiply $-7p{q}^2{r}^{3}and-13p^3{q}^{2}r$

$\therefore (-7p{q}^2{r}^3)\times (-13p^3{q}^{2}r)$

$=(-7\times -13)(p\times p^3)(q^2\times q^2)(r^3\times r)$

$=91p^4{q}^4{r}^4$ [$\because a^m\times b^n=a^{m+n}$]