Solve: x2−x−2ge0x^2 - x - 2 \\ge 0x2−x−2ge0
−1lexle2-1 \\le x \\le 2−1lexle2
xle−1x \\le -1xle−1 or xge2x \\ge 2xge2
xge2x \\ge 2xge2
xle−1x \\le -1xle−1