Question

Solve for x. enter your answer in interval notation using grouping symbols x^2+11x<-18

Answer 1

Move the -18 across so that x^2+11x+18<0
then solve as if equal to 0
(x+9)(x+2)<0
x=-9 and x=-2 put these on a graph and it is less than 0 when within the graph hence  x>-9 and x<-2