Question

(i) ab2 + (a - 1)b - 1​

Answer 1

Answer:

=ab because a-a1 = a b-b1= b

Answer 2

Answer:

ab^2+(a-1) b-1

= ab^2 +ab - b - 1 { using ditributive property }

ab(b + 1 ) -1 ( b + 1 )

take b + 1 is common factor ...

( b + 1) (ab - 1 )

.

. .

( b + 1 ) , ( ab - 1 ) are two factors...