Cho a/b=c/d.Chứng minh: 7a^2+3ab/11a^2-8b^2=7c^2+3cd/11c^2-8d^2

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Cho a/b=c/d.Chứng minh:
7a^2+3ab/11a^2-8b^2=7c^2+3cd/11c^2-8d^2

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Nem 4 years 2020-11-03T01:21:26+00:00 0 Answers 61 views 0

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )