A 1 B 2 C 3 D 4 E 5

A <img src="https://www.beizhujiaoyu.com/uploads/202208/16467068695711.jpg" alt="" width="200" height="19" title="" align="" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/164670701719251.jpg" alt="" width="200" height="16" title="" align="" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/164670706831141.jpg" alt="" width="200" height="20" title="" align="" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/164670713897771.jpg" alt="" width="200" height="21" title="" align="" /> E <img src="https://www.beizhujiaoyu.com/uploads/202208/164670717931711.jpg" alt="" width="200" height="19" title="" align="" />

A x₁=-1，x₂=1 B x₁=1，x₂=-2 C x₁=1，x₂=2 D x₁=-1，x₂=2 E x₁=-1，x₂=-2

A 3个 B 4个 C 6个 D 9个 E 12个

A <img src="https://www.beizhujiaoyu.com/uploads/202208/164670791721781.jpg" alt="" width="100" height="62" title="" align="" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/164670795665291.jpg" alt="" width="100" height="63" title="" align="" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/1646708094771.jpg" alt="" width="100" height="63" title="" align="" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/164670812752641.jpg" alt="" width="100" height="63" title="" align="" /> E <img src="https://www.beizhujiaoyu.com/uploads/202208/16467081693721.jpg" alt="" width="120" height="56" title="" align="" />

A 0 B 1 C 2 D 3 E 4

A -2或-1/2 B -2或1/2 C 2或-1/2 D 2或1/2 E 2或-2

A ① B ② C ①② D ②③ E ③④

A 0.4 B 0.5 C 0.6 D 0.7 E 0.8

A a>b>c B a=c>b C c>a=b D a=b=c E b>a=c