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Algebraic Identity: (a + b)^2 = a^2 + b^2 + 2ab

How can we ca...

Question

How can we came to know where we have to use which identity?

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Solution

there is no easy way to know this. First you have to byheart all identities. Then do many problems. First do simple ones and then do more difficult. It will help you to learn to use identities at correct places.

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