填空:(1)3x^2+6xy/(x+y)(x+2y)=3x/()(1)3x²+6xy/(x+y)(x+2y)=3x/( )(2)3a/a-b = 6a²+6ab/( )

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填空:(1)3x^2+6xy/(x+y)(x+2y)=3x/()(1)3x²+6xy/(x+y)(x+2y)=3x/( )(2)3a/a-b = 6a²+6ab/( )
填空:(1)3x^2+6xy/(x+y)(x+2y)=3x/()
(1)3x²+6xy/(x+y)(x+2y)=3x/( )
(2)3a/a-b = 6a²+6ab/( )

填空:(1)3x^2+6xy/(x+y)(x+2y)=3x/()(1)3x²+6xy/(x+y)(x+2y)=3x/( )(2)3a/a-b = 6a²+6ab/( )
1.x+y
2.2(a-b)(a+b)

(X-3xy+4xy-y)-[-2x-2(xy-3/2xy)-y]+6xy的过程 【数学填空题】已知xy=3,x+y=-1,则x²y+xy²=() x³-2x²+x=() x³-x=()【数学填空题】已知xy=3,x+y=-1,则x²y+xy²=()x³-2x²+x=() x³-x=() x³-16x=() 2x²-12x+ x²-y²+5x+3y+4(x+y-2xy)(x+y-z)+(xy-1)² 几道数学题:x-x^2分之x^2-1×1-y分之xy-x,(xy-x^2)÷xy分之x-y,x^2+x分之x-3÷(x^2-6x+9)谢谢! 5xy^2-{2x^y-[3xy^2-(xy^2-2x^2y)]/(-1/2xy)} 化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2 计算:3xy[2xy-x(y-2)+x] (4+2x-3y^2)*(5x+y^2-4xy)*(xy-3x^2+2y^4)的最高次项是填空题 初二数学题(一道填空题,已知(1/x)-(1/y)=3,则代数式(2x-14xy-2y)/(x-2xy-y)的值为填空题,只要答案即可 ①(x²-6x+6)/(x²-1)▪(x²+x)/(x-3)②(xy-x²)÷(x-y)/xy③[(x²-y²)/y]²÷(x²+xy)³▪[xy/(y-x)]²④[(x²+2x-3)/(9-x²)]³▪[-(x-3)/(1-x)]² 1.已知x+y=-4,xy=3,求5(2分之1xy+2y)+[6x-(2xy+y-3x)]的值2.已知(x+3)^2+|x-y+10|=0求代数式5x^2y-[2x^2y-(3xy-xy^2)-3x^2]-2xy^2-y^2的值 填空:(1)3x^2+6xy/(x+y)(x+2y)=3x/()(1)3x²+6xy/(x+y)(x+2y)=3x/( )(2)3a/a-b = 6a²+6ab/( ) 计算:1.(x-1)^2+2(1-x) 2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y)1.(x-1)^2+2(1-x)2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y) 填空 1、x²+6xy+__=(__+__)² 2、( )²+3/2xy+y²=(__+__)² 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 因式分解 (3x+2y)-(x-y)² x²-xy+3y-3x 2x²+xy-y²-4x+5y-6 (-1/2xy)(2/3x^2y-3/2xy^2+6/5y) -2x^2y(-2xy^2)^2+(2xy)^3X(xy^2)说错说错,3xy【2xy-x(y-2)+x】(x+2)(x+3)-(x+6)(x-1)(3/2x^2+xy-3/5y^2)·(-4/3x^2 y^2)