Question

Tentukana himpunan penyelesaian n² - 9n - 10 = 0
1. gunakan rumus ABC
2. gunakan cara pemfaktoran

Answer 1

Rumus ABC.
a = 1
b = -9
c = -10

1


2
Pemfaktoran
n² - 9n - 10 = 0
n² - 10n + n - 10 = 0
n(n - 10) + 1(n - 10) = 0
(n - 10)(n + 1) = 0

n1 - 10 = 0
n1 = 10

n2 + 1 = 0
n2 = -1
HP = {10 , -1}