Question

Please help!
Solve each inequality by using tables or graphs.
3x^2-3x-1 > -1
If you could show you work that would be great! thanks!!!

Answer 1

I wont solve it but I will give you a hint, you can add 1 then factor. graph the resulting parabola and look at the interval on which it is greater than 0

Answer 2

I tried that and the answer resulted as incorrect

Answer 3

well if you graph them you will see the interval where your function is greater than -1 is from (-inf,0) notice I am using the ) brackets and not ] since it is only > and not >=. now the other interval is from (1,inf) these are the same intervals where if you add one to both sides that the new parabola is greater than zero. you did the right thing. the book is wrong, so be confident :)

Answer 4

http://www.onlinefunctiongrapher.com/?f=3*x%5E2-3*x-1 |3*x%5E2-3*x

Answer 5

Thanks!