Question

Find the product : 5a3b2 x (7 - 2ab4 + 3a²b5)​

Answer 1

Step-by-step explanation:

(i) (5−2x)(3+x)

=5(3+x)−2x(3+x)

=15+5x−6x−2x

2

=15−x−2x

2

(ii) (x+7y)(7x−y)

=x(7x−y)+7y(7x−y)

=7x

2

−xy+49xy−7y

2

=7x

2

+48xy−7y

2

(iii) (a

2

+b)(a+b

2

)

=a

2

(a+b

2

)+b(a+b

2

)

=a

3

+a

2

b

2

+ab+b

3

(iv) (p

2

−q

2

)(2p+q)

=p

2

(2p+q)−q

2

(2p+q)

=2p

3

+p

2

q−2pq

2

−q