Question

Equação :  ----------------

3x²-28+9=0

Answer 1

$\Delta= b^{2} -4.a.c \Delta= -28^{2} -4.3.9 \Delta=784-108=676 x1=-+(-28) \sqrt{676}/2.3=28-26/6=2/6$
$x2=-+(-28) \sqrt{676} /2.3=28+26/6=54/6=9$