1.[(-3xy)^2*x^3-2x^2*(3xy^2)^3*1/2y]除以9x^4y^2=2.若a(x^3m)y^12/(3(x^2)y^2n)=4x^6y^8求2m+n-a

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1.[(-3xy)^2*x^3-2x^2*(3xy^2)^3*1/2y]除以9x^4y^2=2.若a(x^3m)y^12/(3(x^2)y^2n)=4x^6y^8求2m+n-a
1.[(-3xy)^2*x^3-2x^2*(3xy^2)^3*1/2y]除以9x^4y^2=
2.若a(x^3m)y^12/(3(x^2)y^2n)=4x^6y^8求2m+n-a

1.[(-3xy)^2*x^3-2x^2*(3xy^2)^3*1/2y]除以9x^4y^2=2.若a(x^3m)y^12/(3(x^2)y^2n)=4x^6y^8求2m+n-a
1.[(-3xy)^2*x^3-2x^2*(3xy^2)^3*1/2y]除以9x^4y^2
=（9x^5y^2-27x^5y^5)/9x^4y^2
=x-3xy^3
2.
a(x^3m)y^12/(3(x^2)y^2n)
=a/3*x^(3m-2)y^(12-2n)=4x^6y^8
所以,a/3=4,a=12
3m-2=6,m=8/3
12-2n=8,n=2
2m+n-a=2*8/3+2*2-12=28/3-12=4/3

3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x) 因式分解X^3-2xy+xy^2 2x²y-3(2xy-xy)-xy 3xy(x^2y-xy^2+xy)-xy^2(2x^2-6xy+2x)过程 计算：3xy(x²y-xy²+xy)-xy²(2x-xy+2x） 2(x平方-xy)-3(2x平方-3xy) 1-(3xy-x)+【-2(2x+3xy)】 -3(2x^2-xy)+4(x^2+xy-6) 化简:xy分之3x^2+2xy-xy分之2x^2-xy= 计算：3xy[2xy-x（y-2）+x] 2x平方-3xy+(2xy-x平方)化简! 因式分解x^3+2xy-x-xy^2= 计算3xy[2xy-x(y-2)+x-1] （-3x^y+2xy)-( )=4x^+xy 4(x²+xy-6)-3(2x²-xy) (2x的平方-xy)+(x的平方+xy-3) -3(2x²-xy)+4(x²+xy-6) 因式分解x²-2xy-3x