<span>50 : 7 = 7 (ост. 1) ............... 7 * 7 + 1 = 49 + 1 = 50
67 : 7 = 9 (ост. 4) ................ 9 * 7 + 4 = 63 + 4 = 67
76 : 9 = 8 (ост. 4) ................ 8 * 9 + 4 = 72 + 4 = 76
8 : 9 = 0 (ост. 8) ................. 9 * 0 + 8 = 0 + 8 = 8
30 : 4 = 7 (ост. 2) ............... 7 * 4 + 2 = 28 + 2 = 30</span>
|n-1,9|=3,14
n-1,9=3,14 или n-1,9=-3,14
n=3,14+1,9 n=-3,14+1,9
n=5 n=-1,24
Х^2+5х+6=0
Д=5^2 -4*6=1
Х=-5+-1/2=3; 2.