4(X-0.123)+7(Y+3.45)=1于5(x-0.123)-(y+3.45)=11同解,求X,Y
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x)3y#B@Nms 7RXȳ5|T"Q Ѵ54|::66ED$S ;& O7l|6c=l+n!`F=7̬5+muMl@a Z
(x-4y)分之(3x)+(4y-x)分之(x+y)-(x-4y)分之(7y)
4(X-0.123)+7(Y+3.45)=1于5(x-0.123)-(y+3.45)=11同解,求X,Y
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
(7y-2x)-(7x-4y)
因式分解(X+2Y)(3X-7Y)平方-4(X+2Y)(X+Y)平方
-(5x+y)-7(x-y) -2分之1(x+y)+4分之1(x+2y) 4x-2(x-2) -2x-(3x-1) x-(5x-2y)+2(2x-y)
化简,亲快啊啊急!(3x-2y)(7x-y)-(4x+3y)(x-y)
(x+2y)(3x-7y)²-4(x-2y)(x+y)² 分解因式
4Y(Y-X)^6分之2x(x-y)^7
{(x²+y²)-(x-y)+2y(x-y)}/4y
[(x+2y)²-(x+y)(x-y)-7y²】÷(2y)
(x减4y分之3x)加(4y减x分之x加y)减(x减4y分之7y)
先化简在求值 (x+5y)(x+4y)-(x-y)(x+y),其中,x=-2又2/3,y=3/7
化简求值(x+5y)(x+4y)-(x-y)(x+y),其中x=一又2/5,y=-1/7
因式分解:-x平方+4x-4;8(x平方-2y平方)-x(7x+y)+xy,4x三次方-4x平方y-(x-y),x平方y-5xy平方+6y三次方
(y-x)^4(x-y)^3+2(x-y)^6(y-x)
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
12(x+y)^3(y-x)/【4(x+y)^2(x-y)】