Factor the expression. Express your answer so that only positive exponents occur. (3m + 9)-2/5 + (3m + 9) 1/5 + (3m + 9) 7/5
A. (3m + 9)-2/5 [1 + (3m + 9)-3/5 + (3m + 9) -9/5]
B. (3m + 9)-2/5 [1 + (3m + 9) 3/5 + (3m + 9) 9/5]
C. (3m + 9)-2/5 [1 + (3m + 9) 3/5 - (3m + 9) 9/5]
D. (3m + 9)-2/5 [1 + (3m + 9) 4/5 + (3m + 9) 7/5]
Answer: B
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