Question

Please explain!!! find the lcm of the set of polynomials 16ab^3,5b^2,a^2,20ac

Answer 1

For an explanation using numbers see
http://www.khanacademy.org/math/arithmetic/factors-multiples/v/least-common-multiple--lcm

the 2nd half (last few minutes) are the way to do this problem.

Answer 2

thanks!

Answer 3

using the idea in the video, break up each into "prime factors"
16 a b^3 --> 2^4 a b^3
5 b^2 --> 5 b^2 so far: 2^4 5 a b^3
a^2 ---> a^2 so far: 2^4 5 a^2 b^3
20 a c ----> 2^2 5 a c so far: 2^4 5 a^2 b^3 c
final answer is 2^4 5 a^2 b^3 c or
80 a^2 b^3 c

Answer 4

that helps a lot..great explanation! thank you so much!