Question

$2x {}^{2} - 4x - 5$
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Answer 1

Resposta:

x' = 4 + 7,48/4 =11,48/4 = 2,87

x" = 4 - 7,48/4 = -3.48/2 =  - 1,74

Explicação passo-a-passo:

2x² - 4x -5

x = (4 +_ V16 +40)/4

x = (4 +_V56)/4

x = (4 +_7.48)/4

x' = 4 + 7,48/4 =11,48/4 = 2,87

x" = 4 - 7,48/4 = -3.48/2 =  - 1,74