x^2+y^2+z^2= x+y+z+2020

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x^2+y^2+z^2= x+y+z+2020

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Helga 6 years 2020-11-07T03:37:55+00:00 0 Answers 48 views 0

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