Đáp án:
Giải thích các bước giải:
=> x^2-x=13x+6;
=> x^2-14x-6=0;
x= 14-Căn(55); x=-14-căn(55)
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.