josephineboateng2005 josephineboateng2005

07-07-2021
Mathematics

contestada

211 base x is equal to 10110 base 2

Respuesta :

07-07-2021

Hello,

[tex](211)_x=(10110)_2\\\\2*x^2+x+1=22\\\\2x^2+x-21=0\\\Delta=1+4*2*21=169=13^2\\x=\dfrac{-1+13}{4}= 3\\or\\x=\dfrac{-1-13}{4}\ may\ not\ be\ negative\\\\[/tex]

x=3

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