(根号1/2-根号0.75)-(根号1/3-根号4.5)
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![(根号1/2-根号0.75)-(根号1/3-根号4.5)](/uploads/image/z/2687470-70-0.jpg?t=%EF%BC%88%E6%A0%B9%E5%8F%B71%2F2-%E6%A0%B9%E5%8F%B70.75%EF%BC%89-%EF%BC%88%E6%A0%B9%E5%8F%B71%2F3-%E6%A0%B9%E5%8F%B74.5%EF%BC%89)
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(根号1/2-根号0.75)-(根号1/3-根号4.5)
(根号1/2-根号0.75)-(根号1/3-根号4.5)
(根号1/2-根号0.75)-(根号1/3-根号4.5)
(根号2/2-2根号3/3)-(根号3/3-3根号2/2)
=根号2/2-2根号3/3-根号3/3+3根号2/2
=2根号2-根号3
第一个是2分之负根号三加一