【数学填空题】已知xy=3,x+y=-1,则x²y+xy²=() x³-2x²+
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【数学填空题】已知xy=3,x+y=-1,则x²y+xy²=() x³-2x²+x=() x³-x=()
【数学填空题】
已知xy=3,x+y=-1,则x²y+xy²=()
x³-2x²+x=() x³-x=() x³-16x=() 2x²-12x+18=()
3m²-3=()
【数学填空题】
已知xy=3,x+y=-1,则x²y+xy²=()
x³-2x²+x=() x³-x=() x³-16x=() 2x²-12x+18=()
3m²-3=()
![【数学填空题】已知xy=3,x+y=-1,则x²y+xy²=() x³-2x²+](/uploads/image/z/15668560-64-0.jpg?t=%E3%80%90%E6%95%B0%E5%AD%A6%E5%A1%AB%E7%A9%BA%E9%A2%98%E3%80%91%E5%B7%B2%E7%9F%A5xy%3D3%2Cx%2By%3D-1%2C%E5%88%99x%26%23178%3By%2Bxy%26%23178%3B%3D%EF%BC%88%EF%BC%89+x%26%23179%3B-2x%26%23178%3B%2B)
已知xy=3,x+y=-1,则x²y+xy²=(-3)
x²y+xy²=xy(x+y)=3×(-1)=-3
x³-2x²+x=() =x(x²-2x+1)=x(x-1)²
x³-x=() =x(x²-1)=x(x+1)(x-1)
x³-16x=() =x(x²-16)=x(x+4)(x-4)
2x²-12x+18=()=2(x²-6x+9)=2(x-3)²
3m²-3=() =3(m²-1)=3(m+1)(m-1)
x²y+xy²=xy(x+y)=3×(-1)=-3
x³-2x²+x=() =x(x²-2x+1)=x(x-1)²
x³-x=() =x(x²-1)=x(x+1)(x-1)
x³-16x=() =x(x²-16)=x(x+4)(x-4)
2x²-12x+18=()=2(x²-6x+9)=2(x-3)²
3m²-3=() =3(m²-1)=3(m+1)(m-1)
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