tim x biet x-8=o
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TT
1
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21 tháng 12 2015
-8+|x|=-12
|x|=-12+8
|x|=-4 mà |x|>=0(với mọi x)
nên \(x\in\phi\)
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X - 8 = 0
X = 0 + 8
X = 8
#Ninh Nguyễn
X - 8 = 0
X = 0 + 8
X = 8
hok tốt