Prime factorization for these numbers?

Question

30t, and ,40t (the t in 40 is squared)
6, and ,9t
16k,and ,40k (the k in 16 is squared)
9m, and ,15n


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Answer 1

PROBLEM 1:

30t and 40t²

Factor out 10t:
--> 10t (3 + 4t)


PROBLEM 2:

6 and 9t

Factor out 3:
--> 3(2 + 3t)


PROBLEM 3:

16k² and 40k

Factor out 4k:
--> 4k(4k + 10)


PROBLEM 4:

9m and 15n

Factor out 3:
--> 3(3m + 5n)