1.x-y=16,xy=6,求3x²y-6xy²+18y+6

问题描述:

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)

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+20...