Question

Решите пример срочно

Answer 1

(30a9a^2-25+55-3a):(3a-53a+5-1)

1)30a/(3a-5)(3a+5)-5/(3a-5)=(30a-15a-25)/(3a-5)(3a+5)=(15a-25)/(3a-5)(3a+5)==5(3a-5)/(3a-5)(3a+5)=5/(3a+5)

2)(3a-5)/(3a+5)-1=(3a-5-3a-5)/(3a+5)=-10/(3a+5)

3)5/(3a+5):(-10)/(3a+5)=5/(3a+5)*(3a+5)/(-10)=-1/2