A$$abdala kongr$$ensleri $$z$$n$$z$.$

$($a$)x^2+4x+8=0(mod15)$

$($b$)x^3+10x^2+x+3=0(mod{3}^3)$;

$($c$)5x^4+x^3-2x^2+1=0(mod25)$

$($d$)x^3-2x+4=0(mod125)$