计算.x+1分之1-1.﹙x+1﹚-x+1分之x².?
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1/(x+1)-1
=[1-(x+1)]/(x+1)
=-x/(x+1)
﹙x+1﹚-x²/(x+1)
=[(x+1)²-x²]/(x+1)
=(x²+2x+1-x²)/(x+1)
=(2x+1)/(x+1)
m²/(m+n)-(m-n)
=[m²-(m+n)(m-n)]/(m+n)
=(m²-m²+n²)/(m+n)
=n²/(m+n),9,不懂你什么意思,写下来拍成照片发上来,0,计算.x+1分之1-1.﹙x+1﹚-x+1分之x².
m+n分之m²-﹙m-n﹚.
=[1-(x+1)]/(x+1)
=-x/(x+1)
﹙x+1﹚-x²/(x+1)
=[(x+1)²-x²]/(x+1)
=(x²+2x+1-x²)/(x+1)
=(2x+1)/(x+1)
m²/(m+n)-(m-n)
=[m²-(m+n)(m-n)]/(m+n)
=(m²-m²+n²)/(m+n)
=n²/(m+n),9,不懂你什么意思,写下来拍成照片发上来,0,计算.x+1分之1-1.﹙x+1﹚-x+1分之x².
m+n分之m²-﹙m-n﹚.
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