Đáp án: b)4x-5
Giải thích các bước giải: 9x^2+12x -5=3x3x+3x4-5= 4x-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.