Question

Akar" persamaan x*-4x-12=0 adalah x1 dan x2 maka nilai x1+x2=

Answer 1

X^2 - 4x - 12 = 0
a = 1
b = -4
c = -12

x1 + x2 = -b/a
= -(-4)/1
= 4

Pembuktian :

x^2 - 4x - 12 = 0
Faktorkan
(x - 6)(x + 2)
x = 6 dan x = -2

6 + (-2) = 4