Question

me ajuda a responder ? 3x levado ao quadrado -9x+2=0 

Answer 1

$3x^{2}-9x+2=0\\\\a=3\\b=-9\\c=2$
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$\Delta=b^{2}-4*a*c\\\Delta=(-9)^{2}-4*3*2\\\Delta=81-24\\\Delta=57$

$x = (-b\pm\sqrt{\Delta})/2a$
$x=(-[-9]\pm\sqrt{57})/(2*3)$
$x=(9\pm\sqrt{57})/6$

$x'=(9+\sqrt{57})/6\\x''=(9-\sqrt{57})/6$