Question

C) x² +5x + 6 = 0
D) x² – 5x +6 = 0

E) x² + x – 1 = 0

Answer 1

Resposta:

c) delta= 25-24

delra=1

×=-5+1/2=-4/2=-2

×=-5-1/2=-6/2=-3

d) delta =25-24=1

×=5+1/2=6/2=3

×=5-1/2=4/2=2

e) delta= 1+4=5

×=-1+v5/2

×=-1-v5/2