1)Х^2 - 7х +6 =0 2)Х^2 + 8х + 16 =0 3) 5 1/6 : х = -31

Question

1)Х^2 - 7х +6 =0
2)Х^2 + 8х + 16 =0
3) 5 1/6 : х = -31

Answer 1

D=в^2-4ас=49-25=25 x1=-в-√D/2a=7+5/2=6 x2=-в-√D/2a=7-5/2=1