Question

C) X²+ x/5 = 0
D) 2x² + 5 x = 0
E) - X² + 4 x = 0​

Answer 1

Resposta:

D) a= 2 b= 5 c=0

∆=-b²-4ac

∆= 5²- 4.2.0

∆= 25-0

∆= 25

∆=√25= 5

X1,2= ± b√∆/ 2.a

x1= -5+5/2 =0/4

x2=-5-5/2= -10/4 = 2,5