2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]求答案!
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2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]求答案!2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]求答案!2(x^2-xy
2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]求答案!
2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]求答案!
2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]求答案!
2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]
=2x^2-2xy-6x^2+9xy-2x^2+4x^2-2xy+2y^2
=-2x^2+5xy+2y^2
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2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]
=2x^2-2xy-6x^2+9xy-2x^2+4x^2-2xy+2y^2
=-2x^2+5xy+2y^2
2y^2-2x^2+5xy
则x-5=0，m=0 x=5，m=0 -2ab^y-1与4ab^3的同类项则b的指数一定相同 y=3 （2x^2-3xy 6y^2）-m(3x^2-xy 9y^2) =（2×5^2-3×5×
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
化简:xy分之3x^2+2xy-xy分之2x^2-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）
(-3xy+2xy)-(4xy+xy)
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
（X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程
-3(2x^2-xy)+4(x^2+xy-6)
2(x平方-xy)-3(2x平方-3xy)
1-(3xy-x)+【-2(2x+3xy)】
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)