Respuesta :

lucasella

Answer:

(2x-y+2)(2x+y-2)

Step-by-step explanation:

4x² - y² + 4y - 4=

=(2x)²-(y²-4y+4)

=(2x)²-(y-2)²

= [2x-(y-2)][2x+(y-2)]

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

a²-b²=(a-b)(a+b)

surakshya666

Step-by-step explanation:

the answer is (2x-y+2) (2x+y-2)

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