x＋1＝5(y+2)。3(2x-5)－4(3y+4)＝5

因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y)因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x

3x(2x＋y)－2x(x-y),其中x＝1,y=1/53x(2x＋y)－2x(x-y),其中x＝1,y=1/53x(2x＋y)－2x(x-y),其中x＝1,y=1/5算术题？结果5

化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,

5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2]5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2]5/4(x+y)(-x-y)^3

5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解5x^3

5x^3y(x-y)^3-10x^4y^3(y-x)^25x^3y(x-y)^3-10x^4y^3(y-x)^25x^3y(x-y)^3-10x^4y^3(y-x)^25x^3y(x-y)^3-10x

(2x-y)(3x-4y)-2(x-y)(2x-5y)简便运算(2x-y)(3x-4y)-2(x-y)(2x-5y)简便运算(2x-y)(3x-4y)-2(x-y)(2x-5y)简便运算原式=(6x&

5X^3Y(X-Y)-10X^4Y^3(Y-X)^2因式分解5X^3Y(X-Y)-10X^4Y^3(Y-X)^2因式分解5X^3Y(X-Y)-10X^4Y^3(Y-X)^2因式分解5X^3Y(X-Y)

3(x+y)+2(x-y)=364(x+y)-5(x-y)=23(x+y)+2(x-y)=364(x+y)-5(x-y)=23(x+y)+2(x-y)=364(x+y)-5(x-y)=23(x+y)+

4(x-y)-3(x-y)=95(x-y)+2(x-y)=114(x-y)-3(x-y)=95(x-y)+2(x-y)=114(x-y)-3(x-y)=95(x-y)+2(x-y)=11打错了吧,这样

3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=273(x+y)-4(x-y)=11,2(x-y)+5(x+y)=273(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27化

（x-y）^3×（y-x）^4+（x-y）^2×（y-x）^5（x-y）^3×（y-x）^4+（x-y）^2×（y-x）^5（x-y）^3×（y-x）^4+（x-y）^2×（y-x）^5（x-y）^3

计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x

先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y)x=4y=5先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y)x=4y=5

3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y)化简合并同类项3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y)化简合并同类项3(x-y)-2(x+y)-5(x-

(3x+2y)(4x-5y)-11(x+y)(x-y)+5xy,其中x＝三分之一,y＝-二分之一.先化简再求值.(3x+2y)(4x-5y)-11(x+y)(x-y)+5xy,其中x＝三分之一,y＝-

已知x－y＝1,y≠0,求｛(x＋2y)²＋（2x＋y）(x＋4y)－3(x＋y）（x－y)｝÷y的值.已知x－y＝1,y≠0,求｛(x＋2y)²＋（2x＋y）(x＋4y)－3(x

用代入法解下列方程组：（1）｛y=x-3,y-2x=5；（2）｛x－3y=7,3x+用代入法解下列方程组：（1）｛y=x-3,y-2x=5；（2）｛x－3y=7,3x+y=1；（3）｛2x-y＝5,x

{x+y=1,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+

4分之x－y＝﹣1x＋4y＝4,求x,y0.2x＋0.5y＝5分之10.4x＋0.1y＝5分之2,求x,y4分之x－y＝﹣1x＋4y＝4,求x,y0.2x＋0.5y＝5分之10.4x＋0.1y＝5分之