himpunan penyelesaian √4-x<√x-5

√4-x < √x-5 → 4 - x < x - 5
                       -x - x < -5 -4
                          -2x < -9
                             x < -9/2
Syarat akar : 4 - x < 0
                        -x < -4
                         x < 4
HP : -9/2 < x < 4