(x^2-y)在x^2 y^2小于等于1上的二重积分
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/23 07:54:30
P=x²/x-y-y²/x-y=(x²-y²)/(x-y)=(x+y)(x-y)/(x-y)=x+y当x=2,y=1时p=3Q=(x+y)²-2y(x
(x^2-y^2)/(x+y)-(4x(x-y)+y^2)/(2x-y)=(x-y)(x+y)/(x+y)-(4x^2-4xy+y^2)/(2x-y)=(x-y)-(2x-y)^2/(2x-y)=(x
(x-y)^2*(y-x)^2*(x-y)^6=(x-y)^2*(x-y)^2*(x-y)^6=(x-y)^10再问:能详细一点吗?我,初一的再答:(x-y)^2=(y-x)^2=(x-y)^2*(x
1)x(x-y)(x+y)-x(x+y)^2=x((x-y)(x+y)-(x+y)^2)=x(x^2-y^2-x^2-2xy-y^2)=x(-2xy-2y^2)=-2xy(x+y)2)(2a+b)(2
【(x-y)^2+(x+y)(x-y)】除以2x=(x-y)*(x-y+x+y)/2x=(x-y)*2x/2x=x-y
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y=[x²-y²-x²-2xy-y²-xy+xy²]/(y/2)=[(x-2)y
(x+y)ˆ2-2(x+y)(x-y)+(x-y)ˆ2=(x+y-x+y)^2=(2y)^4=4y^2如果满意请点击右上角评价点【满意】即可~再问:这个我看不懂,能不能写下来啊,谢
先一个一个的展开括号项,再同项合并就行了啊[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x=[xx-xy-(xy-yy)+x(x-y)+y(x-y)]÷2x=[xx-xy-xy+yy+xx-
7X^3-6X^3Y+3X^2Y+3X^3+6X^3Y-3X^2Y-10X^3化简7X^3-6X^3Y+3X^2Y+3X^3+6X^3Y-3X^2Y-10X^3=(7x^3+3x^3-10x^3)+(
(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方=x²-2xy-3y²-x²+4y²-x²+2xy-y²=(x²-
∵P=x2x-y-y2x-y=(x-y)(x+y)x-y=x+y,∴当x=2,y=-1时,P=2-1=1;又∵Q=(x+y)2-2y(x+y)=x2-y2,∴当x=2,y=-1时,Q=22-(-1)2
4x^2+y^2-4xy-4(x^2-xy+2xy-2y^2)展开化简吧!
=(x-y)[(3x+y)-(2x+3y)]*(x-y)=(x-y)*(x-y)(3x+y-2x-3y)=(x-y)(x-y)(x-2y)到底是化简,还是?=(x*x-2xy+y*y)(x-2y)=x
(1)x^2/x)-y-x-y=x-y-x-y=-2y(2)(a/a-b)-(a/a+b)-(2b^2/a^2-b^2)=a(a+b-a+b)/(a^2-b^2)-(2b^2/a^2-b^2)=2b/
解题思路:根据题意,由整式的运算的知识整理,分析可以求得解题过程:
解代数式得:-3x的平方y-2y的三次方因为1/2的平方=-1/2的平方,所以结果仍正确给分吧!嘿嘿!
原式=(x+y)(x-y)[(x+y)(x-y)-(x²+y²)]=(x+y)(x-y)(x²-y²-x²-y²)=-2y²(x+
原式=x²-2xy+y²+6x²+3xy-4xy-6x²+xy=x²-2xy+y²=(x+y)²当x=2分之1,y=1时,原式=(
1.[(x-y)^2-2(y-x)]÷(x-y)=[(x-y)^2+2(x-y)]÷(x-y)=(x-y)(x-y+2)÷(x-y)=x-y+22.[(3a-7)^2-(a+5)^2]÷(4a-24)