Đáp án:
3.25
Giải thích các bước giải:
$(x+3)(x-3)-(x-2)^2$
$= x^2-9-(x^2-4x+4)$
$=x^2-9-x^2+4x-4$
$=4x-13$
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.