已知x-y=6,xy=-2,求3（xy+x-2y）-5(y-2x)+2(xy-x)的值.RT.答对加悬赏.

来源：学生作业帮助网 编辑：六六作业网 时间：2025/01/13 01:44:54
已知x-y=6,xy=-2,求3（xy+x-2y）-5(y-2x)+2(xy-x)的值.RT.答对加悬赏.已知x-y=6,xy=-2,求3（xy+x-2y）-5(y-2x)+2(xy-x)的值.RT.

已知x-y=6,xy=-2,求3（xy+x-2y）-5(y-2x)+2(xy-x)的值.RT.答对加悬赏.
已知x-y=6,xy=-2,求3（xy+x-2y）-5(y-2x)+2(xy-x)的值.
RT.答对加悬赏.

已知x-y=6,xy=-2,求3（xy+x-2y）-5(y-2x)+2(xy-x)的值.RT.答对加悬赏.
已知x-y=6,xy=-2,
求3（xy+x-2y）-5(y-2x)+2(xy-x)的值.
=3xy+3x-6y-5y+10x+2xy-2x
=5xy+11x-11y
=5×(-2)+11×6
=-10+66
=56;
很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,

答：
x-y=6，xy=-2
3(xy+x-2y)-5(y-2x)+2(xy-x)
=3xy+3x-6y-5y+10x+2xy-2x
=11x-11y+5xy
=11(x-y)+5xy
=11*6+5*(-2)
=66-10
=56

x-y=6
xy=-2
3(xy+x-2y)-5(y-2x)+2(xy-x)
=3xy+3x-6y-5y+10x+2xy-2x
=5xy+11x-11y
=11(x-y)-10
=11*6-10
=56

56,你把xy等于负二代入,,展开的十一倍X减Y减十,得五十六。

已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值. 已知(xy)/(x+y)=6求(3x-2xy+3y)/(-x+3xy-y)的值. 已知:x/y=-2,求x^2-2xy-3y^2/x^-6xy 已知x/y=2,求 [x^2-xy+3xy^2 ] / [ x^2+xy+6y^2]的值 已知xy^2=-2,求-xy（x^2y^5-xy^3-y)的值. 已知xy^2=-2 求-xy(x^2y^5-xy^3-y) 已知1/x-1/y=2,求3x+7xy-3y/2x-3xy-2y答案是1/x-1/y=2(y-x)/xy=2 得：x-y=-2xy(3x+7xy-3y)/(2x-3xy-2y)=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy)=xy/(-7xy)=-1/7 谁能帮我解释一下=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy) 是怎 已知x^2-xy=5,xy-y^2=-3求3(x^2-xy)-xy+y^2 已知x+y=4,xy=-2,求代数式3(xy+2y)-(xy-6x)的值 已知x+y=4,xy=-2,求代数式3（xy+2y）-（xy-6x） 已知x:y=3:2,求(x²+3xy)/(xy+2xy) 已知xy为正整数,3xy=2x+3y+5.求xy=? 已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理. 已知X+y=6,xy=7 求x^2y+xy^2=已知X+y=6,xy=7 x^2y+xy^2 已知xy/x+y=3,求2x-3xy+2y/-x+3xy-y的值 已知xy/x+y=3,求2x-3xy+2y/-x+3xy-y的值 已知x-y=3xy,求分式3x+2xy-3y/x-2xy-y的值 已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值