Verified answer

Ответ:

Объяснение:

1) х²-5х-6

D = 25 +24 = 49 = 7²

x1 = (5+7)/2 = 6

x2 = (5-7)/2 = -1

=> х²-5х-6 = (x -6) (x+1)

2) 3х²-х-2

D= 1+4*2*3=25=5²

x1 = (1+5)/2*3=1

x2= (1-5)/2*3=-2/3

=>3х²-х-2=3(x-1)(x+2/3)