Answer:
Explanation:
To find the square of 81, we can use the property of special products:
(a + b)² = a² + 2ab + b²
In this case, a is 80, and b is 1. Now, let's apply the formula:
81² = (80 + 1)²
81² = 80² + 2 * 80 * 1 + 1²
81² = 6400 + 160 + 1
81² = 6561
So, the correct square of 81 is 6561, and the process involves using the special product formula (a + b)².