Question

Expand the following:
(a) (x – 2y)^2
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Answer 1

Answer:

x^2 - 2.x.2y + (2y)^2

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

Step-by-step explanation:

Hope this helps.

Answer 2

Answer:

Step-by-step explanation:

Using the identity (a-b)² = a²+b²-2ab

(x – 2y)²

= (x)²+(2y)²-2×x×2y

= x²+4y²-4xy