Good afternoon everyone, I am preparing for exams and thought I would post a couple old paper questions and answers for what I have done, As always I appreciate any input and feedback. 1. The problem statement, all variables and given/known data The Function ƒ(x) = 6x^2+5x a) Write down the Dƒ b) Solve the inequality f(x) < 4 2. Relevant equations 3. The attempt at a solution a)x∈ℝ b) 6x^2+5x<4 6x^2+5x-4<0 (3x+4)(2x-1)<0 3x+4<0 3x<-4 x<-(4/3) 2x-1<0 2x<1 x<1/2 (-4/3)< x <(1/2) I am not sure why x is greater than -4/3 why would the sign change direction here?