y=-4x^2 -3≤x
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/18 17:23:32
x}QN@Y!TIL*?bb`^ʭ"
EJ9 6)D1ƀc-Evz/8$Ƙaff\6Gt3ANK\Vo.K
kDH UBȀПx*كҔ56y)2`&Tʫ83ֈ!O
"T]}WOq6r- Mm
ڻ)D\H"贳Я6ujir=MVytr8z
qtfB$WUbcRa8b݀Pp2u.]#
Lws#xjj=9&ܣ5ߌK
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
2(x+y)-3(x-y)=3 ,4(x+y)+3(x-y)=15
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
已知2y-x=-3,求[4y(2x-y)-2x(2x-y)]/(2x-y
x+y+2(-x-y+1)=3(1-y-x)-4-(y+x-1),x+y=?
已知x=3分之一,y=-2分之一,求代数式x-(x+y)+(x+2Y)-(x+3y)+(x+4y)...-(x+2009y)
先化简再求值2x/(x²-y²)+x/(y²-x²)+y/[(x-y)(x+y)],其中x=-3,y=4
先化简 再求值 (2x-y)(y+x)-(x-2y)(2y+x)-(-3y+x)^2其(√x+1)+y^2+4=-4y