3 years ago

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

Mathematics

1 answer:

liberstina [14]3 years ago

5 0

$2a^2+1=19\\
2a^2=18\\
a^2=9\\
a=-3 \vee a=3$

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