bài 1 : Tìm x :
1. (81−x2).(−2x−16).(−3x+15)=0(81−x2).(−2x−16).(−3x+15)=0
bài 2: Tìm x,y thuộc Z
1, (2x−1).(4y+2)=−42(2x−1).(4y+2)=−42
2,(5x+1).(y−1)=4
Loga
Toán lớp 6
bài 1 : Tìm x :
1. (81−x2).(−2x−16).(−3x+15)=0(81−x2).(−2x−16).(−3x+15)=0
bài 2: Tìm x,y thuộc Z
1, (2x−1).(4y+2)=−42(2x−1).(4y+2)=−42
2,(5x+1).(y−1)=4
