Помогите с алгеброй, не понимаю...

а) x1 = 0; x2 = 5/12 б) x1 = 5/4; x2 = -5/4 в) x1 = 4; x2 = -7/3 г) x1 = 2; x2 = 17/3 д) x1 = 4/9; x2 = 1

а) x = (5±√(25+144))/(24) = (5±√169)/24 = (5±13)/24. x = (-8±√169)/24, x = (1±√169)/24. б) x = ±√(25/16) = ±5/4. в) x = (-5±√(25+84))/12 = (-5±√109)/12 = (-5±3√3)/12. г) x = (2±√(4-105))/(23) = (2±i√101)/6. д) x = (36±√(1296-972))/(281) = (36±6√3)/162, x = (-18±6√3)/162.