2/1xx+xy+2/1yy是多少?x=2013 y=-2014
=(1/2)(x²+2xy+y²)
=(1/2)(x+y)²
=(1/2)(2013-2014)²
=1/2;
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如果本题有什么不明白可以追问,
2/1xx+xy+2/1yy是多少?x=2013 y=-2014
=(1/2)(x²+2xy+y²)
=(1/2)(x+y)²
=(1/2)(2013-2014)²
=1/2;
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,