Предмет: Алгебра, автор: dada222

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Автор ответа: NNNLLL54
0
 frac{2x^2-2x-4}{x^2+2x-8} = frac{2(x^2-x-2)}{(x+4)(x-2)} = frac{2(x-2)(x+1)}{(x+4)(x-2)} = frac{2(x+1)}{x+4} \\x^2-x-2=0; ,; ; x_1=2,; x_2=-1; ; (teorema; Vieta)\\x^2+2x-8=0; ,; ; x_1=2; ,; x_2=-4; ; (teorema; Vieta)
Автор ответа: егор3228
0
2х^2-2х -4 = х^2-4 + х^2 -2х=(х-2)(х+2)+х(х-2)=(х-2)(х+2+х)=2(х-2)(х+1) х^2+2х-8=х^2+2х+1-9=(х+1)^2 - 9 =(х+1-3)(х+1+3)= (х-2)(х+4) Ответ:2(х+1)/(х+4)
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Mr. Brown … a taxi, … to the airport and … a package tour to France. (to take, to go, to book)

The friends … at the railway station after the train …. (to arrive, to leave)

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The ancient Maya city … long before Europeans … America. (to disappear, to reach)

The family … in the hotel as it … since morning. (to stay, to rain)

The passengers … for 2 hours before they … the flight announced. (to wait, to hear)

Sally … that James … her since childhood. (to know, to love)

The brothers … magnificent castles while they … around Scotland. (to see, to travel)

By the time you … we … all the baggage. (to come, to pack)

My uncle … for years before he … down in Nottingham. (to travel, to settle)

When Molly … Stephen he … a film about the place he … in his childhood. (to call, to watch, to visit)

John … some terrific souvenirs before he … to the hotel.(to buy, to return)

We … some exotic food in the local café which we … in the neighbourhood the day before.(to try, to find)

The hikers … well after they … in the mountains for three days. (to sleep, to wander)

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