Question

SEJA A FUNÇÃO QUADRÁTICA :
$f(x) = 3x ^{2} + x = 0$
CONSTRUA SEU GRÁFICO ATRIBUINDO:
$- 3. - 2. - 1.0.1.2.3$
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Answer 1

$\boxed{\begin{array}{l}\underline{\rm C\acute alculos\,auxiliares:}\\\sf f(-3)=3\cdot(-3)^2-3=27-3=24\\\sf f(-2)=3\cdot(-2)^2-3=12-3=9\\\sf f(-1)=3\cdot(-1)^2-1=3-1=2\\\sf f(0)=3\cdot0^2+0=0\\\sf f(1)=3\cdot1^2+1=3+1=4\\\sf f(2)=3\cdot2^2+2=12+2=14\\\sf f(3)=3\cdot3^2+3=27+3=30\end{array}}$

$\Large\boxed{\begin{array}{c|l}\sf x&\sf f(x)\\\sf -3&\sf24\\\sf-2&\sf10\\\sf-1&\sf2\\\sf0&\sf0\\\sf 1&\sf4\\\sf2&\sf14\\\sf 3&\sf30\end{array}}$