Question

Tentuan akar persamaan berikut.
a. 3x − 12
b. x2 + 7x + 6
c. −3x2 − 5x + 2

Answer 1

A. 3(x - 4)
maka, x - 4 = 0
x = 4

b. (x + 1)(x + 6)
maka,
(x + 1) = 0    atau  (x + 6) = 0
x = -1                    x = -6

c. (3x -  1  )(-x - 2)
maka,
(3x - 1) = 0        atau  (-x - 2) = 0
x = 1/3                        x = -2