your team has two x·sq-tiles, three x-tiles, and one unit tile on his desk and another person has one x·sq- tile, five x-tiles, and eight unit tiles on her desk. You decide to put all of the tiles together on one desk. What is the name for this new group of tiles?
Who knows what the names are? But, doing the algebra,
2x^2+3x+1 + x^2+5x+8 = 3x^2+8x+9