a) aⁿ . a² = a²ⁿ

^{b) \((\dfrac{2}{3})^{2} . (\dfrac{3}{6})^{2} = (\dfrac{2}{3})^{2} . (\dfrac{1}{2})^{2} =(\dfrac{2}{3} . \dfrac{1}{2})^{2} = (\dfrac{1}{3})^{2} = \dfrac{1}{9}\)}

^{c) \((\dfrac{3}{4})^{2} : (\dfrac{6}{12})^{2} = (\dfrac{3}{4})^{2} : (\dfrac{1}{2})^{2} =(\dfrac{3}{4} : \dfrac{1}{2})^{2} = (\dfrac{3}{4} . \dfrac{2}{1})^{2} =(\dfrac{3}{2})^{2} =\dfrac{9}{2} \)}

evryone => everyone

school

mk sửa rùi đó

thấy chữ sửa ko, mấy cái phần in đậm mk chỉ lỗi sai rùi sửa llun đó

Hình bạn ơi, ko có hình hay giữ liệu số sao tính?

B. 

Hi, evryone! My name's Alice and I'm from Koearn. I like read comics and playing the piano. In my free time, I litsen to music. This is my bother, Jack. He're 8. He's very funny! What abot you? What's your hobby?

Sửa: Hi, evryone! My name's Alice and I'm from Koearn. I like reading comics and playing the piano. In my free time, I litsening to music. This is my brother, Jack. He's 8. He's very funny! What about you? What's your hobby?

chả sao cả

( \(( \dfrac{1}{2} + \dfrac{1}{4}) . ( 45 - 45 ) =( \dfrac{1}{2} + \dfrac{1}{4}) . 0 = 0 \)

dấu chấm  . này là nhân nha

cái hình nhỏ quá, ko thấy vạch chia độ