Find 4 * 5 for a*b = 3a + 4b – 2

Question:

Let \( * \) be a binary operation defined by:

\[ a * b = 3a + 4b – 2 \]

Find \( 4 * 5 \).

Solution:

Step 1: Substitute \( a = 4 \), \( b = 5 \)

\[ 4 * 5 = 3(4) + 4(5) – 2 \]

Step 2: Simplify

\[ = 12 + 20 – 2 \]

\[ = 30 \]

Final Answer:

\[ \boxed{30} \]

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