1.x-y=16,xy=6,求3x²y-6xy²+18y+6
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1.x-y=16,xy=6,求3x²y-6xy²+18y+6
2.用因式分解计算(2001+20012001+200120012001)÷(2002+20022002+20022002
1.x-y=16,xy=6,求3x²y-6xy²+18y+6
2.用因式分解计算(2001+20012001+200120012001)÷(2002+20022002+20022002)
2.用因式分解计算(2001+20012001+200120012001)÷(2002+20022002+20022002
1.x-y=16,xy=6,求3x²y-6xy²+18y+6
2.用因式分解计算(2001+20012001+200120012001)÷(2002+20022002+20022002)
把xy=6代入3x²y-6xy²+18y+6=18x-36y+18y+6=18x-18y+6=18*16+6=294
(2001+20012001+200120012001)=2001(1+10001+100010001)
(2002+20022002+200220022002)=2002((1+10001+100010001)
(2001+20012001+200120012001)÷(2002+20022002+200220022002)=2001÷2002
(2001+20012001+200120012001)=2001(1+10001+100010001)
(2002+20022002+200220022002)=2002((1+10001+100010001)
(2001+20012001+200120012001)÷(2002+20022002+200220022002)=2001÷2002
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