Help me please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Решите задачу:
Х+ (3/х)=5 (х+ (3/х))² =5² х²+2*х*(3/х)+(3/х)² =25 х²+6 +(9/х²)=25 х²+(9/х²)=25-6 х²+(9/х²)= 19