alli4476
Hey you guys I REALLY NEED HELP
Delete
Share
This Question is Closed
alli4476
Best Response
You've already chosen the best response.
0
what is the lcm of -14a^3b^7 and 21a^5b^2
alli4476
Best Response
You've already chosen the best response.
0
isit 7a^8b^9
jim_thompson5910
Best Response
You've already chosen the best response.
0
what's the LCM of 14 and 21
alli4476
Best Response
You've already chosen the best response.
0
42
JuanitaM
Best Response
You've already chosen the best response.
2
for the coefficent - LCM multiply the coefficient - what is the smallest number
that both 14 and 21 divide evenly.
So look at x^3 and x^5; Do you see that x^5 is the smallest monomial that
both x^3 and x^5 divide evenly?
-----
And looking at b^7 and b^2; Do you see that b^7 is the smallest?
jim_thompson5910
Best Response
You've already chosen the best response.
0
now find the LCM of a^3 and a^5
alli4476
Best Response
You've already chosen the best response.
0
wait do I divide 3 and 5
jim_thompson5910
Best Response
You've already chosen the best response.
0
you just take the larger exponent
so the LCM is a^5
jim_thompson5910
Best Response
You've already chosen the best response.
0
the LCM of b^2 and b^7 is b^7
jim_thompson5910
Best Response
You've already chosen the best response.
0
all together:
LCM of -14a^3b^7 and 21a^5b^2 is 42a^5b^7
alli4476
Best Response
You've already chosen the best response.
0
are you sure there is not that answer
jim_thompson5910
Best Response
You've already chosen the best response.
0
what answer choices do you have
alli4476
Best Response
You've already chosen the best response.
0
here is what I have
7a^8b^9
249a^8b^9
249a^3b^2
7a^3b^2
jim_thompson5910
Best Response
You've already chosen the best response.
0
looks like you want the GCF (and not the LCM) then
jim_thompson5910
Best Response
You've already chosen the best response.
0
I see the GCF in there, but not the LCM
JuanitaM
Best Response
You've already chosen the best response.
2
agreed with Jim :)
alli4476
Best Response
You've already chosen the best response.
0
oh yeah sorry guys
JuanitaM
Best Response
You've already chosen the best response.
2
your answer for the 7 is correct, but for GCF and exponents; you take the smaller of the exponents
alli4476
Best Response
You've already chosen the best response.
0
ok
alli4476
Best Response
You've already chosen the best response.
0
so it would be 7a^3b^2
alli4476
Best Response
You've already chosen the best response.
0
right
jim_thompson5910
Best Response
You've already chosen the best response.
0
you are correct