Question

Please solve Q.7............​

Answer 1

Just apply the identity (a+b)2=a2+2ab+b2 and simplify it and there is ur answer

Answer 2

Here is your answer.....

(m + 2n)^2 - (2m - n)^2

m^2 + 4n^2 + 4mn- (4m^2 + n^2 - 4mn)

m^2 + 4n^2 + 4mn - 4m^2 - n^2 + 4mn

- 3m^2 + 3n^2 + 8mn

hope this will help you ....

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