can anyone help me with this? i dont understand it, thank you

Answer:
15j^2k^2+10jk^2
Step-by-step explanation:
You distribute the term 5jk to the terms inside parentheses.
5jk(3jk) = 15j^2k^2
5jk(2k) = 10jk^2
Now put in original form:
15j^2k^2+10jk^2