Question

Which of the following is the common factor/factors of $21x^{2}y$ and $21x{y}^2$ ?

• A. $21$
• B. $21xy$
• C. $xy$
• D. All of the above.

Answer 1

The correct option is D All of the above.

Factors of $21x^{2}y$ are $21,x,x\&y$.

Factors of $21x{y}^2$ are $21,x,y\&y$

$\therefore 21,xy\&21xy$ are common factors of $21x^{2}y$ and $21x{y}^2$.