3y-xy-2x=-13 5x-xy-2y=-10 -xy+2x-3y=-18 4y-xy-2x=-1 x ²-xy+8x-8y=3 x ²+x+y+xy=5

Các câu hỏi liên quan

25. I can't tell my son what to do; it's water off a …………………….. 's back with him. * 1 điểm 26. Anna's such a …………………….. horse - I had no idea she'd published a novel. * 1 điểm 27+28. When Jennifer came in soaking wet from the rain, Candice laughed and said, "Look what the cat ....................... in! You are such a …………………….. rat." - ĐIỀN CÂU 27 * 1 điểm 27+28. When Jennifer came in soaking wet from the rain, Candice laughed and said, "Look what the cat ....................... in! You are such a …………………….. rat." - ĐIỀN CÂU 28 * 1 điểm 29. It seems that Mike still has a bee in his …………………….. over the criticism he got in the staff meeting. * 1 điểm 30. They don't have a cat in …………………….. 's chance of getting into the playoffs this year. * 1 điểm 31. When Carla transferred to a new school, she felt like a fish out of …………………….. because she didn't know anyone there. * 1 điểm 32. My brother is a very sweet, warm-hearted man who wouldn't say …………………….. to a goose. How can you suspect him of committing this crime? * 1 điểm 33. The manager decided not to hire Bill as the store greeter because he came across like a …………………….. fish during the interview. * 1 điểm 34. The voters were tired of all the fat …………………….. running for political office. * 1 điểm 35. A: "Is our test really getting rescheduled?" - B: "Yep, our teacher was ahead of me in the lunch line, so I heard it straight from the horse's ……………………..." * giúp với