Answer:

1. 21xy- 3y = 3y(7x-1)

2. 9a-18b = 9(a-2b)

3. -15m^2n+20mn^2  = 5mn(-3m+4n)

4. 24a^2 - 20a^2b + 30a^2 = 2a^2(12-10b+15)

5. 3m-5mn+3m-5m^2 = m(3-5n+3-5m)

Questions:

1. I solved for the GCF by finding the values that can be multiplied to the given factor to get the answer

2. I discovered that this is a very useful skill in math(Opinionated ito kaya di ko alam kung paano sagutin bahala ka diyan.

Step-by-step explanation:

We need to make the right side equal to the left side

1. (3y * 7x = 21 xy), (-1 * 3y = -3y)

2. (9*a = 9a), (9*-2b = -18b)

3. (5mn * -3m = 15m^2n) , (5mn * 4n = 20mn^2)

4. (2a^2 * 12 = 24a^2), (2a^2 * -10b = -20a^2b), (2a^2 * 15 = 30a^2)

5 (m * 3 = 3m), (m * -5n = -5mn), (m* 3 = 3m), (-5m*m = -5m^2)

Good luck, double check mo using symbolab.com

Answer:

1.3

2.(a-2b)

3.(-3m+4n)

4.2a²

5.?