Answer:
(n - 10)(n-1)
Explanation:
You have to choose two values that multiply to 10 and add to -11. Those to values are -10 and -1.
n² - 10n - 1n + 10
Rearrange them so that they can have a common factor.
n² - 1n - 10n + 10
1n (n - 1) + -10 (n + 1)
1n (n - 1) - 10 (n - 1)/ n-1
(n - 10)(n-1)