Question

7 Maryam is trying to expand and simplify (n - 2)²

Here is her working.
A
(n-2)² = (n − 2)(n-2)
= n²-2n - 2n-4
= n²-4n-4
Maryam's answer is wrong.
(a) Find Maryam's mistake.
I should be

Answer 1

Answer
`n^(2) -4n+4`

Explanation:

had to keep the minus than add a plus sign