vote minh 5* nha
$x^3+2x^2y-x-2y$
$=x^2(x+2y)-(x+2y)$
$=(x+2y)(x^2-1)$
$=(x+2y)(x+1)(x-1)$
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.