Part a: factor x2c2 − 4xc2 − 21c2. show your work. (4 points)
part b: factor x2 + 6x + 9. show your work. (3 points)
part c: factor x2 − 9. show your work. (3 points)

Gray looks up the definition of point. a point is a location in a region. what is true about the statement describing the word point? 1. the statement uses the terms location and region that are defined based on an understanding of a point. 2.the statement precisely defines the concept of a point. 3. the statement does not include information needed to fully define a point. 4. the statement is an incorrect description of a point because it does not use mathematical words.