Question

упростите 1) 3-n / nm-n^2 - 3-m / m^2 - n^2
2) 42/ 4a^2-9 + 8/ 2a+3 - 7/ 2a-3

Answer 1

1) 3-n / nm-n^2 - 3-m / m^2 - n^2 =3m-n^2/m^2n-n^3
2)42/ 4a^2-9 + 8/ 2a+3 - 7/ 2a-3=45+2a/4a^2-9