作业帮（x+y）^2-x^2y^2.x^2-3x-1
来源：学生作业帮助网 编辑：作业帮 时间：2024/08/10 14:45:04
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（x+y）^2-x^2y^2.x^2-3x-1
（x+y）^2-x^2y^2.x^2-3x-1
（x+y）^2-x^2y^2.x^2-3x-1
（1） 原式=（x+y-xy)(x+y+xy)
(2) 原式=[x-(√13+3)/2][x+(√13+3)/2]
（x+y）^2-x^2y^2
=(x+y)²-(xy)²
=[(x+y)+xy][(x+y)-xy]
=(x+y+xy)(x+y-xy)
x^2-3x-1
=x²-3x+9/4 -13/4
=(x-3/2)²-13/4
=(x-3/2+√13/2)(x-3/2-√13/2)
2（x-y）²-3(x-y)(-y-x)
x(x-y)2-(y-x)3
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
1.（（y+2x)(-2x+y)+4(x+2y)^2)/3y 2.（2(x-y)^3-8(x-y）^2(x+y)+6y(x-y)^2）/2（x-y)^2
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
（x-y)(x-y)2(y-x) (x+2y-?）(x-2y+?)
计算：x+2y/x-y+2x/y-x-3y/x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
计算（x-y)^2×(x-y)^3×（y-x）×（y-x)^2
（x+y）/2- x-y/2=6 3(x+y)=4(x-y)
（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)】
2分之x+y+3分之x-y；4（x+y）-（x-y)谢谢了,