(x+3y)(3y-1)=9y^2+x等于多少?

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(x+3y)(3y-1)=9y^2+x等于多少?

(x+3y)(3y-1)=9y^2+x等于多少?
(x+3y)(3y-1)=9y^2+x等于多少?

(x+3y)(3y-1)=9y^2+x等于多少?
化简到最后为3y(1-1/x)=2
题目应该要求的是整数吧,则x=3,y=1

3/X+2/Y=6/1等介于?(X不等于18)A.x/3+y/2=1/6 B .3Y+2X C.X=18Y/Y-12 D .Y=12X/X-18 y(x+y)+(x-y)²-(x+y)(x-y),其中x=-1/3,y=3 在线等先化简、在求值(x/y-y/x)除以【|x/y+y/(x)-2】除以|【|1+y/(x)】其中x=1/2,y=1 /先化简、在求值(x/y-y/x)除以【|x/y+y/(x)-2】除以|【|1+y/(x)】其中x=1/2,y=1/3 3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12 已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y) 若x+y=4,则多项式1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y值是() (x+y)/2- x-y/2=6 3(x+y)=4(x-y) 2(x-y)²-3(x-y)(-y-x) {5(x-3y)-6=2x+1 3(x+6y)+4=9y+19 {3分之2(x-y)=4分之x+y-1 6)x+y)=4(2x-y)+16 (x-y)(x+y)-(x+y)+2y(y-x),其中x=1,y=3 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) 解下列方程 {x+y=9 (1) {(10y+x)-(10x+y)=9 (2){(10x+y)-3(x+y)=23 (1){5(x+y)+1=10x+y (2){x+y=9 (1){(10y+x)-(10x+y)=9 (2) {(10x+y)-3(x+y)=23 (1){5(x+y)+1=10x+y (2) (x+3y)(3y-1)=9y^2+x等于多少? (2x-3y)平方-(2x+3y)(2x-3y)-2y(9y-1) 其中x=1/3 y=-1(2x-3y)平方-(2x+3y)(2x-3y)-2y(9y-1) 其中x=1/3 y=-1/2 化简求值 2(x+y)-(x-3y)=13 4(x+y)+3(x-3y)=1解方程组 2(x+y)-(x-3y)=13 4(x+y)+3(x-3y)=1 因式分解(1)x^3-xy^2+x^2-y^2 (2)x^4-6x^2y^2+9y^4 ( 3 )4x^2-4xy+y^2-81快点呐 在线等=v=!~ 3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9 化简:(x+y)+(2x+y/1*2)+(3x+y/2*3)+...+(9x+y/8*9)