Question

d) x2+ x + 12 = 0
e) x2+ x - 2 = 0
f) 3x2-15x + 12 = 0​

Answer 1

Resposta:

D- 2 + x + 12 = 0

14 + x = 0

X = - 14

E- 2 + x - 2 = 0

X=0

F-6-15x + 12 = 0

18- 15x=0

-15x = -18

5x=6

Explicação passo a passo:

Answer 2

Resposta:

e)

( a = 1 ; b = 1 ; c = -2)

∆= 1² - 4 . 1 . (-2)

∆= 1 + 8

∆= 9

x= -1 +/- √9/2.1

x'= -1 + 3/2

x'= -2

x"= (-1) - 3/2

x"= 1