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lethinh
2 năm trước
c,(3x-6).3=3 mũ 2 d,(3x-6).3=3 mũ 2 e,(3x-2 mũ4) .7 mũ 3 =2.7 mũ 4 |x|=|-7| |x+1|=2 |x+1|=3 và x+1<0 x+|-2|=0 4.(3x-4)-2=18 tìm x
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