Question

Решите пожалуйста!!!!​

Answer 1

Ответ:

((5m+2)/(5m-2)-(5m-2)/(5m+2)):(20m/(12-75m²))

1) (5m+2)/(5m-2)-(5m-2)/(5m+2)=((5m+2)²-(5m-2)²)/((5m+2)(5m-2))=

=(25m²+20m+4-25m²+20m-4)/(25m²-4)=40m/(25m²-4).

2)20m/(12-75m²)=20m/(3*(4-25m²))=-20m/(3*(25m²-4)).

3) (40m/(25m²-4)):(-20m/(3*(25m²-4))=40m*(3*(25m²-4))/(-20m*(25m²-4))=-6.