Question

(x-2y) whole square give me suitable answer

Answer 1

(x-2y)whole square=x^2-2xy+y^2
=x^2-2×x×2y+2y^2
=x^2-4xy+4y^2.

Answer 2

Hey there! ☺☻☺

$(x-2y)^2\\=(x)^2 + (2y)^2 - 2\times x \times 2y \ \ [(a-b)^2 =a^2 +b^2 - 2ab]\\=\boxed{\boxed{\bold{x^2 + 4y^2 - 4xy}}}$