Question

Помогите решить срочно!!!

Answer 1

$frac{3a}{a-3} + frac{(a+5)*54}{2*(3-a)*a(a+5)} = frac{3*a}{(a-3)} + frac{27}{a(3-a)} = frac{3*a}{(a-3)} - frac{27}{a(a-3)} = frac{3 a^{2} -27}{a(a-3)}$

продолжаем

$frac{3*( a^{2}-9) }{a*(a-3)} = frac{3*(a-3)*(a+3)}{a*(a-3)} = frac{3*a+9}{a}$