Question

25 баллов (1 пример по математике)

Answer 1

х2-17х+42=0
D= b^2-4ac=17^2-4×1×42=289-168=121
x1=-b-√D/2a=17-√121/2=17-11/2=3
x2=-b+√D/2a=17+11/2=28/2=14
x1=3 x2=14
3+14=17