Question 1043804
x^2-8x+18=0
It has no real roots.
the discriminant (b^2-4ac)=(64-72)=-8
You input the function in Y= and push graph.
{{{graph(300,300,-10,10,-10,10,x^2-8x+18)}}}
13x^2+24x+13=0, adding 14 to both sides.
This, too has no real roots.  The discriminant is (576-676)=-100
{{{graph(300,300,-5,5,-10,10,12x^2+24x+13)}}}