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  • Find the following squares by using the identities. (iv) (2xy+5y)^2

Q : 3    Find the following squares by using the identities.

            (vi) (2xy+5y)^2

Answers (1)

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we use the identity
(a+b)^{2} = a^{2} + 2ab + b^{2}
 In this a = 2xy  and b =5y
                                   (2xy+5y)^{2} = (2xy)^{2} + 2(2xy)(5y) + (5y)^{2}
                                                              =  4x^{2}y^{2} + 20xy^{2} + 25y^{2}

Posted by

Gautam harsolia

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