Question

15b^8c^9,5b^5c^8,21b^4c^2 Find the LCM. I am having a hard time with these

Answer 1

I'll try to simplify this for you...so that u can do it yourself....

Answer 2

first write each as a product of the number and different variables
15b^8c^9 = 15 * b^8 * c^9

5b^5c^8 = 5 * b^5 * c^8

21b^4c^2 = 21 * b^4 * c^2

Answer 3

Then find the LCM of the numbers (here they r 15, 5 and 21) ..... I hope u know how to do this
LCM of these numbers is 105

Now for each variable take the one with highest power/index
for b it is b^8
for c it is c^9

Now combine all these to get the LCM as 105b^8c^9