Question
Multiply the following :
$-7 p q^2 r^3,-13 p^3 q^2 r$
$-7 p q^2 r^3,-13 p^3 q^2 r$
✓
Answer
We have, $-7 p q^2 r^3$ and $-13 p^3 q^2 r$
$\therefore\left(-7 p q^2 r^3\right) \times\left(-13 p^3 q^2 r\right)$
$=(-7) \times(-13) \times\left(p \times p^3\right) \times\left(q^2 \times q^2\right) \times\left(r^3 \times r\right)$
$=91 p^4 q^4 r^4$
$\therefore\left(-7 p q^2 r^3\right) \times\left(-13 p^3 q^2 r\right)$
$=(-7) \times(-13) \times\left(p \times p^3\right) \times\left(q^2 \times q^2\right) \times\left(r^3 \times r\right)$
$=91 p^4 q^4 r^4$
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