Question

x² - 3x -1 = 0 preciso do cALCULO

Answer 1

x² - 3x -1 = 0

∆=b²-4ac = (-3)² -4.1.(-1)= 9+4= 13

x = -b±√∆/2a

x = 3±√13/2.1

x' = 3+√13/2

x''= 3-√13/2