2x-5=-1 при х=2
Находим
f (-1) = f (2·2-5) = 22-3·2+5=3
или так:
замена переменной
2 х-5=t ⇒ x = (t+5) / 2
f (t) = ((t+5) 2/4) - 3· ((t+5) / 2) + 5
f (t) = (t2+4t+15) / 4
f (-1) = (1-4+15) / 4=3
The history says that the city of Yalta was opened in the first century astray during a storm by Greek sailors.
Also in the Middle Ages the city belonged to the Byzantine Empire.
In the late 19th century Yalta transforms into a popular resort.
At the same time the construction of hotels and boarding houses, thanks to this rapidly expanding city boundaries and population.
In the sixties of the Yalta included lying nearby towns Derek, I-Vasil AutkaAy-Vasil.
What are you wearing today? A jacket.
What is the weather like today? It is sunny and windy.
What are your parents doing at the moment? They are watching TV.
What time do you get up every day? I usually get up at 8 o"clock.