Sagot :
Answer:
C. (x + 3) cm
Step-by-step explanation:
Just factor it out. (x+3) (x+3) = x^2 + 6x + 9
1. If the area of a square piece of paper is (x2 + 6x + 9) square cm, how long is one side of the piece of paper
A. (x+9) cm
B. (x+6) cm
C. (x+3) cm