Question

which is the common factor in all terms 3xy+15xy²+9xy²+21y³​

Answer 1

Step-by-step explanation:

$\\ \rm3xy + 15 {xy}^{2} + {9xy}^{2} + {21y}^{3}$

$\\ \rm = \red{ \boxed{ \rm3y}}(x + 5xy + 3xy + 7 {y}^{2} )$

The common factor in 3xy + 15xy² + 9xy² + 21y³ is 3y.