Question

alguém pode mim ajuda a responde essa

Answer 1

12 * (x² - x) = 10¹ 
12x * (x - 1) = 10 
6x * (x - 1) = 5 
6/5x * (x - 1) = 0 

Calculando as raizes =3

6/5 x = 0 → x' = 0 
(x - 1) = 0 → x" = 1 

Prova ;)
log 0 = 1 

Answer 2

Boa noite

$x^{2} -x= 12^{1}$ ⇒x²-x=12 ⇒ x²-x-12=0

Δ=(-1)² - 4*1*(-12) = 1+48 ⇒ Δ = 49   e   √Δ =7

$x'= \frac{-(-1)-7}{2*1} = \frac{1-7}{2} = \frac{-6}{2} =-3$

$x''= \frac{-(-1)+7}{2*1} = \frac{1+7}{2} = \frac{8}{2} =4$

S = { -3 , 4}