Question

x ao quadrado - x =12

Answer 1

x² - x = 12
x² -x - 12 = 0 

a = 1
b = - 1
c = - 12

Δ = b² -4 .a . c
Δ = (-1)² -4 . 1 . (-12)
Δ = 1 + 48
Δ = 49

$\mathtt{\dfrac{-b+-~\sqrt{\Delta}}{2~.~a}~~=~~\dfrac{-(-1)+-~\sqrt{49}}{2~.~1}~~=~~\dfrac{1+-~7}{2}} \\ \\ \\ \mathtt{x' = \dfrac{1+7}{2}~~=~~\dfrac{8}{2}~~=~~4} \\ \\ \\ \mathtt{x'' = \dfrac{1-7}{2}~~=~~-\dfrac{6}{2}~~=~~-3} \\ \\ \\ \boxed{\boxed{\mathtt{Resposta: s = -3~~e~~~4}}}$

Answer 2

Resposta:

x² - x = 12

x² -x - 12 = 0  

a = 1

b = - 1

c = - 12

Δ = b² -4 .a . c

Δ = (-1)² -4 . 1 . (-12)

Δ = 1 + 48

Δ = 49

Explicação passo a passo: