Question

Multiply : $-12\mathrm{p}$by $7\mathrm{q}$

Answer 1

Product of two monomials $=$ ( product of their numerical coefficients) x ( product of their literal coefficients )

$$\begin{gathered} =(-12\mathrm{p})\times 7\mathrm{q} \\ =-84\mathrm{pq} \end{gathered}$$ [ Sign convention : (+) x (+) = (+) ; (+) x (-) = (-) ; (-) x (-) = (+) ; (-) x (+) = (-) ]

Hence, $-84\mathrm{pq}$ Is the product