16 x ³  +  8 x ²  +  x   =  0 .........

16x^3 + 8x^2 + x = 0 x(16x^2+8x+1)=0 x=0   i    16x^2+8x+1-0                 D=b^2-4ac = 8^2-4*16*1 = 64-64=0                 D=0 - одно решение                                                                                               -b при дискриминанте равным нулю формула D =----------                                                                                              2a x=-8/2*16 = -8/32 = -1/4     OTBET: x=-1/4 i x=0     вроде так