-(2x^20-7xy)-2[2x^2-(3x^2-5xy+y^2)]化简
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-(2x^20-7xy)-2[2x^2-(3x^2-5xy+y^2)]化简
-(2x^20-7xy)-2[2x^2-(3x^2-5xy+y^2)]化简
-(2x^20-7xy)-2[2x^2-(3x^2-5xy+y^2)]化简
第一项错了吧,是平方
-(2x^2-7xy)-2[2x^2-(3x^2-5xy+y^2)]
=-2x^2+7xy-4x^2+2(3x^2-5xy+y^2)
=-6x^2+7xy+6x^2-10xy+2y^2
=-3xy-10xy+2y^2
3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x)
因式分解2x^-xy
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因式分解X^3-2xy+xy^2
x^2-xy/xy-y^2约分
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因式分解:xy^2-2xy-x
因式分解:8(x-2y)-x(7x+y)+xy.
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
(xy-x²)÷(x²-2xy+y²/xy)×(x-y/x²)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
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)
约分:x*2+xy/x*2+2xy+y*2
(x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy)
-3(2x^2-xy)+4(x^2+xy-6)