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Factorize a2b24a+4...

Factorize a2b24a+4

A.

(a + b)(a − b)

B.

(a − 2 + b)(a - 2- b)

C.

(a + 1)(a − 2 + b)

D.

(a + b) 2

Correct answer is B

The trinomial = a24a+4a2b24a+4=(a24a+4)b2(a22a2a+4)b2a(a2)2(a2)]b2(a2)2b2(a2+b)(a2b)