(4xy+9)2+(12x-3y)2
=16x2y2+72xy+81+144x2-72xy+9y2
=16x2y2+81+144x2+9y2
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.