Дарья2802 6x²+x-1=0
a=6;b=1;c=1
D = b²-4ac
D = 36- 4*1*1= 32
D>0 => 2 корня
x½ = -b +- √D \ 2a
x¹ = -6 -√32 \ 2 = -6 - 5 √7 \ 2 = -11 √7 \ 2
x²= -6+√32\2= -6+5√7\2 = -1√7\2