Question

Решите уравнение:
$6 x^{2} + x - 1 = 0$

Answer 1

D=1+24=25  x1=(-1+5)/12=1/3  x2=(-1-5)/12=-1/2

Answer 2

D=1-4*(-1)*6=25=5²
х1=(1-5)/6*2=-4/12=-1/3
х2=(1+5)/6*2=6/12=1/2