(-x+y)(y²+x²)再乘以( )就等于x`4-y`4 A.X-Y B.X+Y C.-X+Y D.-X-Y
(-x+y)(y²+x²)再乘以( )就等于x`4-y`4 A.X-Y B.X+Y C.-X+Y D.-X-Y
A.X-Y B.X+Y C.-X+Y D.-X-Y
`表示次方
A.X-Y B.X+Y C.-X+Y D.-X-Y
`表示次方
數(shù)學(xué)人氣：177 ℃時(shí)間：2020-03-27 18:57:55
優(yōu)質(zhì)解答
就相當(dāng)于用x^4-y^4除以(-x+y)(y^2+x^2)得到的結(jié)果,就是所求.(x^4-y^4)/[(-x+y)(y^2+x^2)]=[(x^2-y^2)(x^2+y^2)]/[(y-x)(y^2+x^2)]=(x^2-y^2)/(y-x)=(x+y)(x-y)/(y-x)=-(x+y)(y-x)/(y-x)=-(x+y)——答案：D...
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