Question

Model x2 + 3x + 5 in the Gizmo by dragging or clicking blue x?-tiles, green x-tiles, and yellow 1-tilesinto the top bin. How many of each type of tile did you use?

Answer 1

A.

x^2 and 2x^2 means:

3 x^2 tiles

3x - 4x = -x

ONE -x tiles

5 - 1 is "4"

B.

2x^2 - 4x - 1

This is just an expression

so there are 2 x^2 tiles, 4 -x tiles and one 1-tiles