Question

If x^2-11x+3x<0 then which of the following could be the value of x?

Answer 1

for x = 0

x = [ 11 +/- sqrt(121 -12) ]/ 2

x = 5.5 +/- .5 sqrt(109)

this is a parabola
positive for x ---> + or - infinity
so negative only between those roots
center at x = 5.5
answers between 5.5 - .5 sqrt 109 and 5.5 + .5 sqrt 109