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Formula
Graph
$y = x ^ { 4 } + 2 x ^ { 2 } + 9$
$y = 0$
$y$Intercept
$\left ( 0 , 9 \right )$
Derivative
$4 x ^ { 3 } + 4 x$
Seconde derivative
$12 x ^ { 2 } + 4$
Local Minimum
$\left ( 0 , 9 \right )$
$x ^{ 4 } +2x ^{ 2 } +9 = 0$
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