Hey! can someone check my answers?
1.find the greatest common factor: 20y^9 +5y^6
a. 5y^6
b. 5y^9
c. 10y^9
d. 20y^3

and

2. find the greatest common factor: 12xy^5+ 60x^4y^2 _ 24x^3y#3.

a. 3x^4y^5
b. 6xy^5
c. 6xy^2
d. 12xy^2

The greatest common factor is the biggest number taken from the values.

Q1. The answer is A. 5y^6


Since , then 

Back to our expression:

The greatest common factor is thus 

Q2. The answer is D. 12xy^2


We will use the rule   to factorise the exponents:

The greatest common factor is thus