Math, asked by priyanshu5760, 1 year ago

find the expansion of the following (2/3x + 5/7y)^2

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Answered by aaditya4983

5

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Answered by bhaskaranv2

1

Step-by-step explanation:

(a-b)²=a²-b²-2ab> identity

(2/3x-5/7y)²=(2/3x)²+(5/7y)²-2(2/3x)(5/7y)

Ans=4/9x²+25/49y²-20/21xy

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