Q83 of 128 Page 224

Multiply the following:
(ab + c), (ab + c)

The multiplication is as follows:

(ab + c)×(ab + c)

= (ab.ab + ab.c + ab.c + c.c)

= a²b² + 2abc + c²

The product is = a²b² + 2abc + c²

Multiply the following:

rs; r³s²

Multiply the following:

(a² - b²), (a² + b²)

Multiply the following:

(pq- 2r), (pq- 2r)

Multiply the following:

Multiply the following:(ab + c), (ab + c)