13-07-2016
Mathematics

contestada

F(X)=2x^2 +1 find and simplify:: if f(a) =19 find a.
Isn't a just 19??

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konrad509 konrad509

13-07-2016

[tex]2a^2+1=19\\ 2a^2=18\\ a^2=9\\ a=-3 \vee a=3[/tex]

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