Tính $(97^{3}+83^{3}) ÷180-97×83$ Question Tính $(97^{3}+83^{3}) ÷180-97×83$ in progress 0 Môn Toán Bơ 1 year 2020-10-21T22:08:29+00:00 2020-10-21T22:08:29+00:00 2 Answers 87 views 0
Answers ( )
Đáp án:
Giải thích các bước giải:
`(97^3+83^3):180-97.83`
`={(97+83)(97^2-97.83+83^2)}/{180}-97.83`
`={180.(97^2-97.83+83^2)}/{180}-97.83`
`=97^2-97.83+83^2-97.83`
`=97^2-2.97.83+83^2`
`=(97-83)^2`
`=14^2`
`=196`
`(97^3+83^3)÷180-97.83`
`=[(97+83)(97^2-97.83+83^2)]÷180-97.83`
`=[180.(97^2-97.83+83^2)]÷180-97.83`
`=97^2-97.83+83^2-97.83`
`=(97-83)^2`
`=196`
Học tốt !