-x²:x² =?
Giải thích tại sao
Đáp án:
$-x^2:x^2$
$= -1x^2:1x^2$
$= [(-1):1].(x^2:x^2)$
$= -1$
Choose the best answer.
We are looking for ____ place to spend ____ night.
Please turn off ___ lights when you leave ___ room.
I like _____ colorful costumes of ____ ethnic minority people in Vietnam.