Question

Selecione a alternativa correta:​

Answer 1

Resposta:

x²-3x-4

delt= (-3)²-4.1.(-4)

delt=9+16

delt=25

x=$\frac{3+-5}{2}$

x'=$\frac{3+5}{2} =\frac{8}{2} =4$

x''=$\frac{3-5}{2} =\frac{-2}{2} = -1$

letra d)4 e -1