Chemistry, asked by Sid77, 6 months ago

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Answered by Riya1045
5

Explanation:

We know the identities a

2

−b

2

=(a+b)(a−b) and (a+b)

2

=a

2

+b

2

+2ab

It is given that x=

a−b

a+b

and y=

a+b

a−b

and calculate x−y using above identities as shown below:

x−y=

a−b

a+b

a+b

a−b

=

(a−b)(a+b)

(a+b)(a+b)−(a−b)(a−b)

=

a

2

−b

2

(a+b)

2

−(a−b)

2

=

a

2

−b

2

(a

2

+b

2

+2ab)−(a

2

+b

2

−2ab)

=

a

2

−b

2

a

2

+b

2

+2ab−a

2

−b

2

+2ab

=

a

2

−b

2

4ab

Hence, x−y=

a

2

−b

2

4ab

Answered by jaswasri2006
0

option d is the correct answer

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