Expand the following, using suitable identities. (2x - 5y)(2x - 5… - Vidyadip

Question

Expand the following, using suitable identities. $(2x - 5y)(2x - 5y)$

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Answer

$(2x - 5y)(2x - 5y)$
$ =(4 x)^2+(5 y)^2-2 \times 2 x \times 5 y $
$ =16 x^2+25 y^2-20 x y $

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