Question

Hi guys :)
represent the solution set of the inequality on a number line.
|x^2-1|<= 4

Answer 1

\[
|x^2-1|<= 4\implies -4<=x^2-1<= 4
\]

Answer 2

Which gives us: \[
0\leq x^2+3 \leq 8
\]And \[
-8\leq x^2-5\leq 0
\]

Answer 3

Find roots in both cases.