Question 616970
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi, 
If 5x + x² > 100 then x^2 + 5x -100 > 0 and x is not in the interval [-12.81,7.81]
 f(x) = x^2 + 5x -100 {{{x = (-5 +- sqrt(425))/(2) }}}  
 x-intercepts: (7.81,0) and (-12.81)
{{{drawing(300,300, -20, 20, -100, 10,  grid(1),
circle(0, 0,0.4),
circle(7.81, 0,0.4),
circle(-12.84, 0,0.4),
graph( 300, 300,  -20, 20, -100, 10,0,x^2 + 5x -100 ))}}}