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    Những bài toán chưa có lời giải

    Mọi người cho mình hỏi về gmat If AB = 40, what is the value of AB(A + 2B)? (1) A - B = -18. (2) A²B = 80. (a) Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not. (b) Statement (2) BY ITSELF is sufficient to answer the question, but...
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