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因式分解(99^3-99)÷98
人气:229 ℃ 时间:2020-06-16 20:13:58
解答
(99^3-99)÷98
=99*(99^2-1)÷98
=99*(99+1)(99-1)÷98
=99*100*98÷98
=99*100
=9900
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