D-U-N-G =>TE-DO-TO-JI

His hair is short.

=(x⁴-1)+(x⁴-x²)

=(x²-1)(x²+1)+x²(x²-1)

=(x²-1)(2x²+1)

=(x-1)(x+1)(2x²+1)

1 c

2 b

3 b

4 a;b

5 d

6 f

7 f

8 f

9 d;f

10 f

11 f

bạn chon giúp mk nha

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mk biết hellochao, lingcor, tiếng anh 123, duolingo và ioe

1 I played chess last night.

2 He went to Nha Trang last week.

3 We went to Sam Son last summer.