Lê Quốc Trần Anh Coordinator
12/07/2017 at 09:26-
\(\dfrac{2^2.3^2.4^2.5^2}{28800}=\dfrac{\left(2.3.4.5\right)^2}{28800}=\dfrac{120^2}{2.14400}=\dfrac{120^2}{2.120^2}=\dfrac{1}{2}\)
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