Question

Решите пожалуйста.Пример приложен.

Answer 1

(4+4v7-v7-7)*3v7+9v7=(-3-3v7)*3v7+9v7=-9v7-3×3×v7×v7+9v7=-9×7=-63

Answer 2

(1+√7)(4-√7)*3√7+9√7=(4-√7+4√7-7)*3√7+9√7=12√7-3*7+12*7-21√7+9√7= -21+84=63