MENU
Question -

Find the product.
(i) (5 тАУ 2x) (3 + x)
(ii) (x + 7y) (7x тАУ y)
(iii) (a2+ b) (a + b2)
(iv) (p2 тАУ q2) (2p + q)



Answer -

(i) (5 тАУ 2x) (3 + x)

= 5 (3 + x) тАУ 2x (3 + x)

=15 + 5x тАУ 6x тАУ 2x2

= 15 тАУ x -2 x┬а2

(ii) (x + 7y) (7x тАУ y)

= x(7x-y) + 7y ( 7x-y)

=7x2┬атАУxy + 49xy тАУ 7y2

= 7x2┬атАУ7y2┬а+48xy

iii) (a2+ b) (a+ b2)

= a2┬а(a + b2) + b(a+ b2)

= a3┬а+ a2b2┬а+ab + b3

= a3┬а+ b3┬а+ a2b2┬а+ ab

iv) (p2тАУ q2) (2p + q)

= p2┬а(2p + q)тАУ q2┬а(2p+ q)

=2p3┬а+ p2q тАУ 2pq2┬атАУ q3

= 2p3┬атАУ q3┬а+ p2q тАУ 2pq2

Comment(S)

Show all Coment

Leave a Comment

Free - Previous Years Question Papers
Any questions? Ask us!
×