Q83 of 128 Page 224

Multiply the following:
abc, (bc + ca)

The multiplication is as follows:

(vii) 7prq, (p - q + r)

The multiplication is as follows:

(7prq)×(p-q + r)

= (7prq.p-7prq.q + 7prq.r)

= 7p²rq-7prq² + 7pr²q

The product is = 7p²rq-7prq² + 7pr²q

Multiply the following:

-5a²bc, 11ab, 12abc²

Multiply the following:

-3x²y, (5y - xy)

Multiply the following:

x²y²z², (xy – yz + zx)

Multiply the following:

(p + 6), (q – 7)

Multiply the following:abc, (bc + ca)The multiplication is as follows:(vii) 7prq, (p - q + r)