Final answer:
To evaluate (a - b)² + 5c for a=7, b=2, and c=4, substitute the values and simplify the expression to get the answer: 25 + 20 = 45.
Step-by-step explanation:
To evaluate (a - b)² + 5c for a=7, b=2, and c=4, we substitute the values of a, b, and c into the expression:
(7 - 2)² + 5(4)
Simplifying, we get: 5² + 20
Therefore, the answer is 25 + 20 = 45.
Learn more about Evaluating expressions