Question

-7$x^{2} -4 x+11=0$

Answer 1

$D=b^{2}-4ac=(-4)^{2}-4*(-7)*11=16+308=324$
$sqrt{D}=18$
$x_{1}= frac{4+18}{-14}= frac{22}{-14}=-1 frac{4}{7}$
$x_{2}= frac{4-18}{-14}= frac{-14}{-14}=1$