Define the operation $\star$ by $a \star b = (a + b)b$. What is $(3\star5) - (5\star3)$?
Question:
Define the operation $\star$ by $a \star b = (a + b)b$. What is $(3\star5) - (5\star3)$?
Answer:
Let's think step by step.

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Define the operation $\star$ by $a \star b = (a + b)b$. What is $(3\star5) - (5\star3)$?
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