Question

Expand the following, using suitable identities.

(i) (xy + yz)

2​

Answer 1

Answer:

(xy+yz)²

using identity (a+b)²=a²+2ab+b²

(xy)²+2(xy)(yz)+(yz)²

x²y²+2xy²z+y²z²

Explanation:

hope it helps

Answer 2

Explanation:

Using the identity (a+b)

2

=a

2

+b

2

+2ab

We have, (xy+yz)

2

=(xy)

2

+(yz)

2

+2(xy)(yz)

=x

2

y

2

+y

2

z

2

+2xy

2

z