Question

expressões
a)a=1 , b=-5 e c=6​

Answer 1

Resposta:

a) a=1 b = 5 c=6

=> x² + 5x + 6 = 0

∆ = b²-4.a.c

∆ = 5²-4.1.6

∆= 25-24

∆ = 1

X1/2 = -B±√∆ / 2.A

X1/2 = -5±√1/2.1

X1/2 = -5±1/2

X1 = -5-1 / 2

X1 = -6/2

X1 = -3

X2 = -5+1/2

X2 = -4/2

X2= -2