x^2+y^2-2x+6y+10=(x-1)²+(y+3)²≥0
所以代數(shù)式x^2+y^2-2x+6y+10的值一定為非負有理數(shù).
已知x,y為任意有理數(shù),則代數(shù)式x^2+y^2-2x+6y+10的值一定為什么
已知x,y為任意有理數(shù),則代數(shù)式x^2+y^2-2x+6y+10的值一定為什么
數(shù)學(xué)人氣：611 ℃時間：2020-05-05 08:32:00
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