作业帮(5x-3 1y)(5 3x-4 3y 2)
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/23 15:37:16
1.25x²-y²2.-25x²+y²3.-(25x²+10xy+y²)4.5x²-24xy-5y²5.y^2n-x^2
x-y+5x-4x=2x-y
5x平方+8xy-4y平方
X=2,Y=3或X=3,Y=2
[(x+2y)(x-2y)-(2x-y)^2+(3x-y))2x-5y)]/(-x)=(x²-4y²)-(4x²-4xy+y²)+(6x²-17xy+
(y-x)(x-y)^3(y-x)^5=(y-x)[-(y-x)^3](y-x)^5=-(y-x)^(1+3+5)=-(y-x)^9=(x-y)^9
因为(x-y)/(x+y)=3,则(x＋y)/(x－y)＝1/3则5(x-y)(x+y)-(x+y)/2(x-y)＝5*3-1/(3*2)=15-1/6=89/6
2X-4Y=6(1)3X+2Y=17(2)(1)+(2)*22X+3X*2-4Y+2Y*2=6+17*28X=40X=5Y=6-2*5/(-4)=13Y=X+5(1)2X+5X=23(2)(题目可能有
(x-y)^5*(y-x)^3*(x-y)^2=-(x-y)^5*(x-y)^3*(x-y)^2=-（x-y）^(5+3+2)=-(x-y)^10
1)(2x+5y)(2x-5y)(-4x^2-25y^2)=-(4x^2-25y^2)(4x^2+25y^2)=-(16x^4-625y^4)=625y^4-16x^42)[（x+y)(x-y)-(x
解(x-y)(x+y)-(x-2y)²+x(3x-5y)-(x-y)(x-2y)=(x²-y²)-(x²-4xy+4y²)+(3x²-5xy
区域是一个正方形
a(x+y)-b(x+y)-x-y=a(x+y)-b(x+y)-(x+y)=(a-b-1)(x+y)
6x/5+y=53y=53-6x/5代入4y/5+x=434(53-6x/5)/5+x=43两边乘5212-24x/5+5x=2155x-24x/5=215-212x/5=3x=15y=53-6x/5
(x+y+z)^5-(x+y-z)^5-(x+z-y)^5-(z+y-x)^5=80xyz(x^2+y^2+z^2)注:x^5,y^5,z^5之类的是被消掉了.我的结果100%是正确的,你再算算吧.朝
你的题目不够清楚,分子和分母请用括号括起来再问：请快点回答?[x-y/2x]+[y/2x][5/x-5]+[x/5-x][5x/x²2xy+y²]-[5y/x²2xy+y
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(2X-3y)-(5x-y)=2x-3y-5x+y=2x-5x-3y+y=(2x-5x)+(-3y+y)=-3x-2y这样写总是全过程了吧
(x+y)²+4(x+y)-5=（x+y+5)(x+y-1)(2a+b)²-4(2a+b)+3=(2a+b-3)(2a+b-1)6y²-11xy-10x²=(2
判断X的数值是否大于Y的数值如果是则为真等式去X的值反之取Y的值