Đáp án:
Giải thích các bước giải:
(xy−1)(xy+5)=x2y2+5xy−xy−5=x2y2+4xy−5
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.