Question

(x-2y)² using identities expand ​

Answer 1

$\huge\underbrace{\green{\bf{SoluTion:}}}$

Given,

☞ (x-2y)²

$\boxed{\sf{(a-b)² = a²-2ab+b²}}$

$→\;{\bf{x²-2(x)(2y)+(2y)²}}$

$→\;{\red{\bf{x²-4xy+4y²}}}$

Hope It Helps You ✌️

Answer 2

It is in the form of (a-b)²

⇒We know that, (a-b)² = a²+b²-2ab

By using that identity :-

(x-2y)² = x²+(2y)²-2(x)(2y)

➝ x²+4y²-4xy

Therefore, the expansion of (x-2y)² is x²+4y²-4xy.

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~hope it helps

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