реакция взаимодействия гидроксида лития и сульфата кальция....решите пожалуйстаа))

4x^4-12x^2+1=0

12y^4-y^2-1=0

решите пожалуйста биквадратные уровнения

Добрый вечер! прошу найдите ошибки в составлении предложений!
Coldplay are a British alternative rock band formed in 1996 by lead vocalist C.M. and lead guitarist J.B. The participants of Coldplay had met in the hostel of London College where they studied. The future singer C. was going to be a historian, j. fond of astronomy, G. saw himself an engineer and B. planned to devote himself anthropology. But england lost the specialist from the fact that they fond of the music. they played for fun and just for yourself released their first mini album. Disk was published a small edition of only 500 copies and it was gave away to friends. Then they saved money and recorded another mini album. by the time Coldplay decided that fully devote themselves to music and at the end of the college will try to sign a contract with a big label. The P. company take under its wing them and helped to release two albums.

Составьте программу вычисления  количеств трёхзначных  чисел, у которых сумма цифр является чётным числом.