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truongnguyenduc123
2 năm trước
Bài 1,Thực hiện phép tính a,-23:(-9)+(-21):9-(-4)-(-55) b,|-3.5-1|+|2.5-6| c,-25-|-5.2-(-7)| Bài 2,Tìm x biết a,x-(-4).(-5)=(-7)-(-15) b,(x+1)² - 1=-10.(-8) Bài 3,Tìm x,y€Z biết a,x²+xy+x+y=3 b,|x-5|+|y+7|=0 MÌNH ĐANG CẦN GẤP LÀM GIÚP MÌNH VỚI (KHÔNG CẦN LÀM HẾT LÀM BAO NHIÊU THÌ LÀM)
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