Answer: 48
Explanation:
To evaluate the expression when y = 7, we substitute the value of y into the expression and calculate the result.
The expression is the product of (y + 1) and (y - 1):
(y + 1) * (y - 1)
Substituting y = 7:
(7 + 1) * (7 - 1)
Now we can simplify:
8 * 6 = 48
Therefore, when y = 7, the expression (y + 1) * (y - 1) evaluates to 48.