निम्नलिखित युग्मो में प्रत्येक के व्यंजको का गुणन कीजिए :
(i) ` 4p,q+r`
(ii) ` ab,a-b`
(iii) `a+b,7a^2b^2`
(iv) ` a^2-9,4a`
(v) ` pq+qr+rp,0`.

Carry out the multiplication of the expressions in each of the following pairs. (i) 4p,q+r (ii) ab,a-b (iii) a+b, 7a^2 b^2 (iv) a^2-9, 4a (v) pq+qr+rp,0

Carry out the multiplication of the expressions in each of the following pairs.(i) 4p,q+r (ii) ab,a-b( iii) a+b,7a^(2)b^(2)( iv )a^(2)-9,4a(v)pq+qr+rp,0