Answer: Factors of 400 = 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200 and 400. Factors of 401 = 1 and 401. Hence, the common factor of 400 and 401 is 1.
Step-by-step explanation:
Answer:
D.
Step-by-step explanation:

It's an expression that consists of variables and coefficients that involves only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables.
example:
x2 − 4x + 7