a方+b方+c方+2a+2b+2c+3=0.求a+b+c等于?
a方+b方+c方+2a+2b+2c+3=0.求a+b+c等于?
數(shù)學(xué)人氣：573 ℃時(shí)間：2020-04-06 03:48:59
優(yōu)質(zhì)解答
＝-3why?（a+1）²+（b+1）²+（c+1）²＝0
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