Question

using identities find the following (2x-7y)2

Answer 1

Hey mate!

Here is your answer > >

(2x-7y)^2=(2x)^2+(7y)^2-2 (2x)(7y)

=4x^2+49y^2-28xy

Identity->(a-b)^2=a^2+b^2-2ab

Hope it helps!

Thankyou ☆ ☆

Answer 2

Heyy mate ❤✌✌❤

Here's your Answer...

⤵️⤵️⤵️⤵️⤵️⤵️

As we know (a-b)^2 = a^2 + b^2 + 2ab

so, (2x -7y)^2 = 4x^2 + 49y^2 - 28xy
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