 In order to complete the square, the student would determine how many unit tiles would be needed to fill in the missing square.In order to complete the square of x2+6x, one would start off with one positive x2 tile and six positive x tiles.Then, they would place the x2 tile in the upper left corner and then one would place three positive x tiles to the right of the x2 tile and three positive unit x tiles under the x2 tile.