Đáp án:28x^2-14x-x^2+x+3x^2-3+16x=30x^2+3x-3
Đáp án:
Giải thích các bước giải: 28X2-14X-(X2-X-3X+3)+16X=28x2-14X-x2+x+3x-3+16x=27X2+6X-3
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.