cho a,b,c>0 c²=a³+b³=3ab+c CMR : 2a²b²+2b²c²+2c²a²=a⁴+b⁴+c⁴
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.