Question

解过程，拜托，谢谢

Answer 1

x₁+x₂=-3, x₁x₂=-5
1/x₁ +1/x₂
=(x₁+x₂)/x₁x₂
=(-3)/(-5)
=3/5
(x₂/x₁)+(x₁/x₂)
=(x₁²+x₂²)/x₁x₂
=[(x₁+x₂)²-2x₁x₂]/x₁x₂
=[(-3)²-2×(-5)]/(-5)
=(9+10)/(-5)
=-19/5

Answer 2

稍等

追答

解
x1+x2=-3, x1x2=-5

1/x1 +1/x2
=(x1+x2)/x1x2
=3/5

追问

写过程

追答

(x2/x1)+(x1/x2)
=(x1平方+x2平方)/x1x2
=(9+10)/(-5)
=-19/5

满意我的回答吗？请记得点击【采纳满意】为我点赞哦....... 顺祝新年快乐...