2分子X+Y-3分子X-Y=6 3(X+Y)=4(X-Y) 老做不对,
【急】已知/x+6/+/y-2又5分子3/=0 求x-y=?)
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)-4(x-y)=4 {x+y/2 + x-y/6=1
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
已知X,Y满足x平方+y平方—4x+y+4分子17=0,求(x+y)平方的值.
2的整式加减求下列整式的值:(XY-2分子3Y-2分子1)-(XY-2分子3Y+1),其中X=3分子10,Y=3分子8.
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5