Question

х(в квадрате)-3х-40=0решить уравнение

Answer 1

D=9-4*-40=169

х1 3+13/2=8

х2= 3-13/2=-5

Answer 2

х²-3х-40=0
D = 169
x1 = (3+13)/2 = 16/2 = 8
x2 = (3-13)/2 = -10/2 = -5