x² -13x +40 = 0 (5)

x² -12x +32 = 0

x² +15x +54 = 0

x² +12x +36 = 0

x² +4x +3 = 0

x² -8x +16 = 0

x² +8x +12 = 0

x² +6x +8 = 0

x² -5x +4 = 0

x² -4x +4 = 0

x² -5x +6 = 0

x² -13x +42 = 0

x² -5x +6 = 0

x² -9x +18 = 0

x² -13x +42 = 0

x² +13x +40 = 0

x² +3x +2 = 0

x² +13x +40 = 0

x² -12x +32 = 0

x² +5x +6 = 0

x² -6x +9 = 0

x² -4x +4 = 0

x² -11x +28 = 0

x² +12x +32 = 0

x² +6x +5 = 0

x² +10x +21 = 0

x² +2x +1 = 0

x² +12x +35 = 0

x² -16x +60 = 0

x² +12x +36 = 0