作业帮4(x-5y)^2-2(4x-5y)(2x-y)-3(y-2x)^2
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4(x-5y)^2-2(4x-5y)(2x-y)-3(y-2x)^2
4(x-5y)^2-2(4x-5y)(2x-y)-3(y-2x)^2
4(x-5y)^2-2(4x-5y)(2x-y)-3(y-2x)^2
题目应该是这样的吧： (4x-5y)-2(4x-5y)(2x-y)-3(y-2x) 原式=[(4x-5y)+(2x-y)][(4x-5y)-3(2x-y)] =(6x-6y)(-2x-2y) =-12(x-y)(x+y) 抱歉,定向思维做的怪,原题目没有问题,可以做如下 原式=(4x-40xy+100y)-(16x-28xy+10y)-(12x-12xy+3y) =87y-24x =3[(根号29)y+(2又根号2)x][(根号29)y-(2又根号2)x]
4x+2y-5x-y
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y)
[(2x+y)^2-(x+y)(x-4y)-5y^2]除以2x
5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2]
(2x-y)(3x-4y)-2(x-y)(2x-5y)简便运算
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
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
x*x+2x+y*y-4y+5=0 x= y=
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
5X^3Y(X-Y)-10X^4Y^3(Y-X)^2因式分解
（x-y）^3×（y-x）^4+（x-y）^2×（y-x）^5
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)
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项