LCM of 15 c^2b^6, 5c^6b^4, 6c^7b^3

Question

having trouble with LCM of 15 c^2b^6, 5c^6b^4, 6c^7b^3

Answer 1

numbers first:

lcm of 15, 5, and 6 is 30

next the c's

lcm of c^2, c^6, and c^7 is c^7

note: c^7 = c^2 * c^5 and c^7 = c^6 * c

next the b's

the lcm of b^6, b^4, and b^3 is b^6

the lcm for the whole thing is 30(c^7)(b^6)

note: you don't have to write it with parentheses.  there's no easy way to do exponents on this page, so I wrote it with parentheses here.