∵x²-3kxy-3y²+3xy-8=x²-3y²+3(1-k)xy-8
令1-k=0 ==>k=1
∴当k为1时,代数式x²-3kxy-3y²+3xy-8中不含xy项.
当k为何值时,代数式x²-3kxy-3y²+3xy-8中不含xy项
当k为何值时,代数式x²-3kxy-3y²+3xy-8中不含xy项
数学人气：976 ℃时间：2019-12-21 20:34:02
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