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what is the lcm of -14a^3b^7 and 21a^5b^2

isit 7a^8b^9

what's the LCM of 14 and 21

42

now find the LCM of a^3 and a^5

wait do I divide 3 and 5

you just take the larger exponent
so the LCM is a^5

the LCM of b^2 and b^7 is b^7

all together:
LCM of -14a^3b^7 and 21a^5b^2 is 42a^5b^7

are you sure there is not that answer

what answer choices do you have

here is what I have
7a^8b^9
249a^8b^9
249a^3b^2
7a^3b^2

looks like you want the GCF (and not the LCM) then

I see the GCF in there, but not the LCM

agreed with Jim :)

oh yeah sorry guys

your answer for the 7 is correct, but for GCF and exponents; you take the smaller of the exponents

ok

so it would be 7a^3b^2

right

you are correct