Question

x2 + 4x +3= =0
por favor me ajudem​

Answer 1

Resposta:

x² + 4x +3 = 0

a= 1

b= 4

c= 3

∆= b² -4.a.c

∆= 4² -4.1.3

∆= 16 - 12

∆= 4

x= -b±√∆ / 2.a

x= -4±√4 / 2.1

x= -4±2 / 2

x' = -4+2 / -2 = -2/2 = -1

x'' = -4-2 / 2 = -6/2 = -3

S= {-1, -3}