Question

Resposta= X²+12x-14=0

Answer 1

X²+12x-14=0

x = -b ⁺₋√b² - 4.a.c / 2.a

x = -12 ⁺₋√12² - 4 .1.(-14) / 2.1

x = -12 ⁺₋√144 - (-56) / 2 

x = -12 ⁺₋√200 / 2

x = - 12 ⁺₋ 14,14 / 2

x' = -12 + 14,14 / 2 
x' = -6 + 14,14 
x' = 8,14

x''= -12 - 14,14 / 2
x''= -6 - 14,14
x''= -20,14