-x³y³-x²y²+xy
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-x³y³-x²y²+xy
已知x²+2x=3,且2ax²+4ax-12=0,求a²+2a的值
已知x-(1/x)=3,求x²+(1/x²)的值
已知x²+2x=3,且2ax²+4ax-12=0,求a²+2a的值
已知x-(1/x)=3,求x²+(1/x²)的值
-x³y³-x²y²+xy
=-xy(x²y²+xy-1);
已知x²+2x=3,且2ax²+4ax-12=0,求a²+2a的值
2a(x²+2x)-12=0;
2a×3-12=0;
6a=12;
a=2;
∴a²+2a=4+2×2=8;
已知x-(1/x)=3,
x²+(1/x²)的值
=(x-1/x)²+2
=3²+2
=9+2
=11;
很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,
=-xy(x²y²+xy-1);
已知x²+2x=3,且2ax²+4ax-12=0,求a²+2a的值
2a(x²+2x)-12=0;
2a×3-12=0;
6a=12;
a=2;
∴a²+2a=4+2×2=8;
已知x-(1/x)=3,
x²+(1/x²)的值
=(x-1/x)²+2
=3²+2
=9+2
=11;
很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,
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