已知x²+y²+2x+4y+5=0,求x-y的值
已知x²+y²+2x+4y+5=0,求x-y的值
數(shù)學人氣:530 ℃時間:2020-02-03 07:07:47
優(yōu)質(zhì)解答
x²+y²+2x+4y+5=0(x²+2x+1)+(y²+4y+4)=0(x+1)²+(y+2)²=0∴x+1=0,y+2=0∴x=-1,y=-2∴x-y=-1-(-2)=-1+2=1很高興為您解答,【數(shù)學之美】團隊為您答題.請點擊下面的【選為滿意回答】按鈕,...
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