Question

(2x – y + 3) (2x - y - 3)​

Answer 1

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Answer 2

Answer:

4x²+y²-4xy-9

Step-by-step explanation:

Let a = (2x-y)

and b = 3

Use the Identity: (a+b)(a-b) = a²-b²

So,

(2x-y)²-(3)² [use identity (a+b)²=a²+b²-2ab]

4x²+y²-4xy-9

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