(a + b)(a − b)
(a − 2 + b)(a - 2- b)
(a + 1)(a − 2 + b)
(a + b) 2
Correct answer is B
The trinomial = a2−4a+4a2−b2−4a+4=(a2−4a+4)−b2(a2−2a−2a+4)−b2a(a−2)−2(a−2)]−b2(a−2)2−b2(a−2+b)(a−2−b)
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