Question

Jika x1 = 3 akar persamaan x^ - x + c = 0 tentukan x2

Answer 1

X1 = 3
x² - x + c = 0
3² - 3 + c = 0
9 - 3 + c = 0
6 + c = 0
c = -6

x² - x - 6 = 0
faktorkan
(x + 2)(x - 3) = 0
x + 2 = 0 atau x - 3 = 0
x = -2 atau x = 3
jadi nilai x2 = -2