Question

Hey you guys I REALLY NEED HELP

Answer 1

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

Answer 2

isit 7a^8b^9

Answer 3

what's the LCM of 14 and 21

Answer 4

42

Answer 5

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?
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And looking at b^7 and b^2; Do you see that b^7 is the smallest?

Answer 6

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

Answer 7

wait do I divide 3 and 5

Answer 8

you just take the larger exponent

so the LCM is a^5

Answer 9

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

Answer 10

all together:

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

Answer 11

are you sure there is not that answer

Answer 12

what answer choices do you have

Answer 13

here is what I have

7a^8b^9
249a^8b^9
249a^3b^2
7a^3b^2

Answer 14

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

Answer 15

I see the GCF in there, but not the LCM

Answer 16

agreed with Jim :)

Answer 17

oh yeah sorry guys

Answer 18

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

Answer 19

ok

Answer 20

so it would be 7a^3b^2

Answer 21

right

Answer 22

you are correct