Question

evaluate the expression when $b = 5$.
$b^2 + 7b + 8$

Explanation:

Step1: Substitute \( b = 5 \) into the expression

Substitute \( b = 5 \) into \( b^2 + 7b + 8 \), we get \( 5^2 + 7\times5 + 8 \).

Step2: Calculate each term

First, calculate \( 5^2 = 25 \), then \( 7\times5 = 35 \).

Step3: Sum up the terms

Now sum the results: \( 25 + 35 + 8 = 68 \).

Answer:

68