Answer:
30a^2b^4.
Explanation:
The LCM of b^4 and a^2 is a^2b^4
LCM of 15 and 6 is found as follows:
6 = 2*3
15 = 3 *5
3 is common to both factors so:
LCM = 2*3*5 = 30.
Answer is 30a^2b^4.
With that, the answer would be 30b^4a^2! The ^# are the squared numbers.
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