Câu trả lời:
Ta có 2/x=x/8 ->x.x=2.8->x mũ 2=16 <-> x=4 hoặc x=-4
Ta có 2/x=x/8 ->x.x=2.8->x mũ 2=16 <-> x=4 hoặc x=-4
B
1.The last time I went out with him was five months ago
-> It is twenty years sine................................................................................
2.It is twenty years since I last spoke to her
-> I havenot....................................................................................................
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