Question

X²-2x-3=0? Qual item apresenta as raizes da equacao

Answer 1

Explicação passo-a-passo:

∆= (-2)²-4.1.(-3)

∆= 4 +12

∆= 16

x= -(-2)±√16/2.1

x= 2 ±4/2

x1= 2+4/2

x1= 6/2

x1=3

x2= 2-4/2

x2= -2/2

x2= -1

S={ -1, 3}