Question

x pertence A | x-12x+35=0​

Answer 1

Vamos là.

x² - 12x + 35 = 0

os coeficientes:

a = 1, b = -12 , c = 35

delta

d = 144 - 140 = 4

as raizes

x1 = (12 + 2)/2 = 14/2 = 7

x2 = (12 - 2)/2 = 10/2 = 5