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Simplify and verify for $p=1$ and $q=1$
$( iv)$. $\frac{-2}{3} pq^{2} \times( \frac{-3}{2}qp^{2})$
Given: $\frac{-2}{3} pq^{2} \times( \frac{-3}{2}qp^{2})$.
To do: To simplify and verify for $p=1$ and $q=1$.
Solution:
$\frac{-2}{3} pq^{2} \times( \frac{-3}{2}qp^{2})$
$=\frac{-2}{3}\times\frac{-3}{2}\times pq^2\times qp^2$
$=p^3q^3$
$=(1)^3\times (1)^3$ [On substituting values $p=1$ and $q=1$. ]
$=1$
On substituting values $p=1$ and $q=1$ in $\frac{-2}{3} pq^{2} \times( \frac{-3}{2}qp^{2})$.
$\frac{-2}{3} pq^{2} \times( \frac{-3}{2}qp^{2})=\frac{-2}{3} \times 1\times( 1)^{2} \times( \frac{-3}{2}\times1\times( 1)^{2})=1$
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