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如果A={(x,y)|x,y+2>0},B={(x,y)|2x+3y-6>0},C={(x,y)|x-4如果A={(x,y)|x,y+2>0},B={(x,y)|2x+3y-6>0},C={(x,y)
化简分式(x-y+4xy/x-y)(x-y-4xy/x+y)的结果是A.x^2-y^2B.y^2-x^2C.x^2-4y^2D.4x^2-y^2化简分式(x-y+4xy/x-y)(x-y-4xy/x+
a(x-y)(x+y)-b(y-x)(x+y)-c(x-y)^2(y+x)提取公因式a(x-y)(x+y)-b(y-x)(x+y)-c(x-y)^2(y+x)提取公因式a(x-y)(x+y)-b(y-
计算4a^4b^7c·(-ab³c²)(2a+y)²-y(y+4x)(x-4y)(2x+3y)-(x+2y)(x-y)计算4a^4b^7c·(-ab³c
C语言答案为什么是84#includevoidf(inty,int*x){y=y+*x;*x=*x+y;}main(){intx=2,y=4;f(y,&x);printf("%d%d\n",x,y);
设A={(x,y)}|3x+2y|.设A={(x,y)}|3x+2y|.B={(x,y)|x-y=2|},C={(x,y)|2x-2y|=3},D={(x,y)|6x+4y=2|},求A∩B,B∩C,
(-x+y)(y²+x²)再乘以()就等于x`4-y`4A.X-YB.X+YC.-X+YD.-X-YA.X-YB.X+YC.-X+YD.-X-Y`表示次方(-x+y)(y²
几道数学题急啊对了再加20分(x+y)^2-(x+y)^3(x-y)^2-(x-y)^3(x-y)^2-(y-x)^32(x-y)-3(y-x)^24ab(a+b)^2-6a^2b(a+b)(x+y)
2a(x-2y)-3b(2y-x)-4c(x-2y)因式分解急.2a(x-2y)-3b(2y-x)-4c(x-2y)因式分解急.2a(x-2y)-3b(2y-x)-4c(x-2y)因式分解急.2a(x
谁能帮我因式分解啊.A.4(x-y+1)+y(y-2x)B.5+7x-6x²C.12x²+xy-6y²谁能帮我因式分解啊.A.4(x-y+1)+y(y-2x)B.5+7x
分解因式1.x^2+y^2+2x+6y+102.(1-y)^3+4(y-x)3.(a-c)^2-4(a-b)(b-c)分解因式1.x^2+y^2+2x+6y+102.(1-y)^3+4(y-x)3.(
下列各式是多项式4x^2-(y-z)^2的一个因式的是()A:4x-y+zB:4y-y-xC:2x-y+xD:2x-y-x下列各式是多项式4x^2-(y-z)^2的一个因式的是()A:4x-y+zB:
已知x、y∈R,且2x²+y²-4x≤0,则A.y²>4xB.y²≤4xC.y²≥4xD.y²≤4x已知x、y∈R,且2x²+y&
化简2x-[3y-5x-(-2x-7y)]等于()A:-7x+10yB:5x+4yC:-x-4yD:9x-10y化简2x-[3y-5x-(-2x-7y)]等于()A:-7x+10yB:5x+4yC:-
【分解因式】x²-xy+4分之1y²x²y-2xy²+y³a(x-y)-b(y-x)+c(x-y)【分解因式】x²-xy+4分之1y
求f(x,y)=,max{|(x-y)/(x+2y+3)|,(x+2)/(x+2y+3),(5y+4)/(x+2y+3)}的最小值用max{a,b,c}表示a,b,c三个数中的最大值,设f(x,y)=
解微分方程(x+y)dx+(3x+3y-4)dy=0答案x+3y+2ln|x+y-2|=c解微分方程(x+y)dx+(3x+3y-4)dy=0答案x+3y+2ln|x+y-2|=c解微分方程(x+y)
已知实数x,y满足x^2+y^2-6x-8y+21=0,若4x+3y+c已知实数x,y满足x^2+y^2-6x-8y+21=0,若4x+3y+c已知实数x,y满足x^2+y^2-6x-8y+21=0,
1、(x+y)-(x+y)^32、x(x-y)-y(y-x)3、(a-b)^2-4b+4a4、a^n+1+a^n+a^n-15、x(x+y)(x-y)-x(x+y)^26、已知a+c-7=0,求(a+
1.x(x-y)-(x-3)(x+3)2.(a^2+b^2)(a+b)(a-b)3.(a-2b+3c)(a+2b-3c)4.(x+y-z)(x-y+z)5.(x^8+y^8)(x^4+y^4)(x^2