Question

Dada a função y=x2 +5x+4 determine o valor de x+x​

Answer 1

Resposta:

y= x^2+5x+4

x^2+5x+4=0

∆=25-16

∆= 9

x'=-5+√9/2

x'= -5+3/2

x'= -2/2

x'= -1

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x"= -5-3/2

x"= -8/2

x"= -4

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x'+x"= -1-4= -5