Question

resolva log de 9 na base x-3 igual a 2:

Answer 1

$log _{x-3} 9=2$
$(x-3)^{2}=9$
(x-3).(x-3)=9
x²-3x-3x+9=9
x² -6x +9 -9=0
x² -6x=0
a=1 b=-6 c=0
Soma: 0+6 = 6
Produto: 6 x 0= 0
S={0;6}