## EmmaH 2 years ago someone please help me!! Find the GCF of the monomials: 18x2, 30x2y, and 54y 18 6 18xy 6xy

1. blondie16

well it cant have an x or y because not all of them have x and y so now you just have to figure out the greatest number that goes into all 3 of the numbers

2. EmmaH

i mean i just dont understand itwhat it wants me to do?

3. blondie16

find the biggest number that goes into all 3 of the numbers

4. EmmaH

80,30, ande 54?

5. blondie16

yes

6. EmmaH

2

7. blondie16

sorry it is 18* 30 and 54 and look at your answer choices. then try it

8. EmmaH

how do i find the biuggest number that goe sinto all of them?

9. blondie16

take each number and divide it by 6, then if all of that works, try 18

10. satellite73

$18=2\times 3^2, 30=2\times 3\times 5,54=2\times 3^3$ greatest common factor is $2\times 3=6$

11. blondie16

or you could do it that way...

12. EmmaH

i got 18= 2,3,6,9 30= 2,3,5,6,10 54= 2,27 so is it 2?

13. blondie16

@satellite73 is right. for 54 you didnt get all of the factors

14. EmmaH

i made a mistake the gfc is 6 right?

15. blondie16

yes

16. EmmaH

17. blondie16

yesh

18. EmmaH

thanks!