①1/2(8x-6y)+3(y-x/3) ②3(2x-3y)-2(3x-2y) ③2(x²-3xy)-3(y²-2xy) ①1/2(8x-6y)+3(y-x/3)②3(2x-3y)-2(3x-2y)③2(x²-3xy)-3(y²-2xy)
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[2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
4x-3y/x-2y÷6y-8x/y-2x
3(x-y)^2-7(x-y)+8(y-x)^2+6(y-x)合并同类项.
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
{x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
x+y=5① x=3y+2① 9x-5y=1① 3x-2y=11① x-2y=y+1① 2x-y=7② x+3y=8② 6x-7y=2② 2x+3y=16② 2x-3y=10②3x+2y=y+1①2x-3y=10②D
解方程组8/(x+y) +(x-y)/2=3,6/(x+y)-(x-y)/4=1
2x+3y-1=y-x-8=x+6 ,y=?
已知:2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x)
计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8)
(1)x^2*x^8+x^13/x^3 (2)a^19/a^12/a^3 (3) (x-2y)^5/(2y-x)^3 (4)(x-y)^5/(x-y) (5)(x-y)^6/(y-x)^4
初二数学多项式乘多项式计算题与不等式①(2x-3)(x-4)-2(x-1)(2+3x)-(2x-5)(x+3)②(3x-2)(2x+3)-6x(x-1)≤2(x-2)③(2x-y)(2x+y)+(x+y)(x-2y)④先化简,再求值,(y-3)(4-5y+2y²)-2y(y²-8y+2),其中y=1
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
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