Question

escreva sentença do estudo do sinal da inequação


-4x elevado a 2 +4x-1<0

Answer 1

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x'<x'' (raízes)

Se a<0 --------------------(x')+++++++++++++++(x'')------------------

Se a>0+++++++++++  (x')---------------------------(x'')++++++++++

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-4x²+4x-1 <0

divida tudo por -4

x²-x+1/4=0

(x-1/2)² > 0

x-1/2=0 ==>x=1/2

x ∈ R - {1/2}  é a resposta