(n-1)^2 = n^2 +1 -2n so the third option form top down
Answer:
n² - 2n + 1
Step-by-step explanation:
You are to square;
(n - 1)²
This is the same as,
(n - 1)(n - 1)
Multiplying the above we get;
n² - n - n + 1
Finally,
