Question

3(x ao quadrado-1)=24

Answer 1

3(x² - 1) = 24

3x² - 3 = 24 

3x² = 24 + 3 

3x² = 27 

x² = 27/3 = 9

x = ±√9

x = ±3

S = {-3 , 3}

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16.02.2016 
Sepauto - SSRC
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