Упростиете выражение:  1. (√8а - √а/2) - (8√а/2 + √2а) 2.(√9х/2 + √50х - √8х) - (√18х - 5√х/2)  Решите уранение: 1. √2х + 3√8х=1 - √2х 2. √х/2 + √2х/9 + √х/8 =1/6  Докажите тождество: 1. (√а - 1/√а) • ( √а+1/√а-1 - √а-1/√а+1 + 4√а)= 4а  
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