EmmaH
someone please help me!! Find the GCF of the monomials: 18x2, 30x2y, and 54y
18
6
18xy
6xy
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blondie16
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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
EmmaH
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i mean i just dont understand itwhat it wants me to do?
blondie16
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find the biggest number that goes into all 3 of the numbers
EmmaH
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80,30, ande 54?
blondie16
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yes
EmmaH
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2
blondie16
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sorry it is 18* 30 and 54 and look at your answer choices. then try it
EmmaH
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how do i find the biuggest number that goe sinto all of them?
blondie16
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take each number and divide it by 6, then if all of that works, try 18
anonymous
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\[18=2\times 3^2, 30=2\times 3\times 5,54=2\times 3^3\] greatest common factor is \[2\times 3=6\]
blondie16
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or you could do it that way...
EmmaH
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i got
18= 2,3,6,9
30= 2,3,5,6,10
54= 2,27
so is it 2?
blondie16
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@satellite73 is right. for 54 you didnt get all of the factors
EmmaH
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i made a mistake the gfc is 6 right?
blondie16
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yes
EmmaH
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the answer is b?
blondie16
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yesh
EmmaH
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thanks!