Answer: The other factor = 7y - 5x
Step-by-step explanation:
If one factor of 21xy^3-15x^2y^2 is 3xy^2, other factor will be achieved by dividing the expression by the known factor
21xy^3-15x^2y^2 ÷ 3xy^2
Factorise the numerator
3xy^2( 7y - 5x )/3xy^2
3xy^2 will cancel each other
The other factor = 7y - 5x
