(4x+2y)*3=(2x+5y)*2 x=?
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(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)请帮我一下写两道计算题[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以(4x)
x+2y=3(x+y)+5 3x-4y=4(x+y)-15
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
已知(x+y)2 =2,(x-y)3 =3,求(x+y)7(x-y)2(x+y)3(y-x)4 的值
.先化简再求值:(2x+y)(2x+y)-(2x-y)平方其中X,Y满足X平方+Y平方-2X+4Y+5=0
若x+y=4,则多项式1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y值是()
y'=(y/x)^2+y/x+4微分方程
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(y-x)^4(x-y)^3+2(x-y)^6(y-x)
若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
12(x+y)^3(y-x)/【4(x+y)^2(x-y)】
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
2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了,
先化简在求值 (x+5y)(x+4y)-(x-y)(x+y),其中,x=-2又2/3,y=3/7