1/2 log (x^2-3) - 1/2 log x = -1 maka X adalah... tolong caranya ya

Question

Matematika Diposting : 2018-01-31 Diupdate : 2018-02-19 gangan5

Pertanyaan

1/2 log (x^2-3) - 1/2 log x = -1
maka X adalah...

tolong caranya ya

Answer 1

1/2 log (x^2-3) - 1/2 log x = -1
= 1/2 log (x^2-3) = 1/2 log x -1
= x^2 - 3 - x + 1
= x^2 - x -2
= (x-2) (x+1)
x = 2 atau x = -1