Question

помогите номер 31.10 (1,3)

Answer 1

3) 2,4-а)(а+2,4)+(1,9+а)(а-1,9) =  frac{43}{20} =2.15

1)  2,4-а)(а+2,4)+(1,9+а)(а-1,9) =  frac{43}{20} =2.15