Question

7. Find the product:
(a) 7a²b and 5ab?
(b) -92xy2 (2x - y)
(c) (5a - 6)(b’a - b)
(d) (2x – y)(x - 2xy + y)​

Answer 1

Ans a=7a²b and 5ab

35a³b²

Ans b= -92xy²(2x-y)

-92xy²×2x-(-92xy²)×y

-184x²y²+92xy³

Ans c=(5a - 6)(b’a - b)

5a(ab-b)-6(ab-b)

5a²b-5ab-6ab+6b

5a²b-11ab+6b

And d=(2x – y)(x - 2xy + y)

2x(x-2xy+y)-y(x-2xy+y)

2x²-4x²y+2xy-xy+2xy²-y²

2x²-4x²y-xy+2xy²-y²