Define the operation $\star$ as $K\star L = (K+L)(K-L)$ for all integers $K$ and $L$. What is the value of $6\star5$?
Question:
Define the operation $\star$ as $K\star L = (K+L)(K-L)$ for all integers $K$ and $L$. What is the value of $6\star5$?
Answer:
Let's think step by step.

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Define the operation $\star$ as $K\star L = (K+L)(K-L)$ for all integers $K$ and $L$. What is the value of $6\star5$?
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