51. Suppose x 2 + 2 is a factor of
What is the value of α + β ?
(A) 5
(B) 6
(C) 7
(D) 8
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統計: A(1), B(0), C(2), D(2), E(0) #2320008
統計: A(1), B(0), C(2), D(2), E(0) #2320008