Question

a²+4a+4-b²

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Answer 1

Step-by-step explanation :

= (a)2 + 2  × a × 2 + (2)2 – (b)2

= (a + 2)2 – (b)2

= (a + 2 + b) (a + 2 – b)

= (a + b + 2) (a – b + 2)

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