Question

help me

(5/7x−1/3y)(5/7x+1/3y)

Answer 1

(i)4/9x²-9/25y²

(ii)25/49x²-1/9y²

Step-by-step explanation:

(i) (2/3x-3/5y) (2/3x+3/5y)

Here, a=2/3x and b=3/5y

Using identity: (a+b)(a-b) = a²-b²

We get, (2/3x)²-(3/5y)²

4/9x²-9/25y²

(ii) (5/7x−1/3y)(5/7x+1/3y)

Here, a=5/7x and b=1/3y

Using identity: (a+b)(a-b) = a²-b²

We get, (5/7x)²-(1/3y)²

25/49x²-1/9y²

Hope it helps you.

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