已知x+y=6,xy=-4,求：（5x-4y-3yx）-（8x-y+2xy）的值英语：同义句转换1.Wegetupafter7o'clockonSunday.Wegetupafter7o'clockonSunday.2.Therewassomethingwrongwiththetelephone.theteleph

Question

已知x+y=6,xy=-4,求：（5x-4y-3yx）-（8x-y+2xy）的值
英语：同义句转换
1.We get up after 7o'clock on Sunday.
We get up____ _____after 7o'clock on Sunday.
2.There was something wrong with the telephone.
_____ _____ ______ _______the telephone.
翻译句子
1.通常我吃容易消化的早餐.
Usually I_____ _______ ______ _______.
2.我们在那吃的很丰盛.
We____ _____ _______ _________there.
3.每天他开车去办公室,所以他比其他人到得早.
Every day he______ ______his office,so he usually______there.

Answer 1

数学：把原式去括号得：-3x-3y-5xy => -3(x+y)-5xy ,把x+y=6,xy=-4带入,得-3*6-5*(-4)=2,答案是2
英语：1.the bed 2.Something wrong is with 3.have light diet breakfast
4.eat a square meal 5.drive to,early