分式约分1.a的四次方-1/a²+2a+12.(x+y)² -10(x+y)+25/(x+y)²+2_数学解答

分式约分
1.a的四次方-1/a²+2a+1
2.(x+y)² -10(x+y)+25/(x+y)²+25

人气：191 ℃　时间：2020-04-13 05:03:13

解答

1.=(a²)² -1²/(a+1)²
=(a²+1)(a+1)(a-1)/(a+1)²
=(a²+1)(a-1)/(a+1)
2.=x+y-5/(x+y+5)(x+y-5)