Помогите решить самостоятельную !!!!!
3. a1/2(a1/2-9) a1/2(a1/4-3)(a1/4+3) a1/2(a1/4-3) a3/4 - 3a1/2 ----------------------- = --------------------------------- = ------------------------ = ------------------------- 7(a1/4+3) 7(a1/4+3) 7 7