Предмет: Алгебра, автор: 4444ARTEM

Алгебра срочно кто шарит помогите

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Ответы

Автор ответа: Evgenia4836

Ответ:

Объяснение:

(x+4)²/(x+5) * 2(5+x)/(x+4)= 2(x+4)

2x+8= 2*0,3+8= 8,6

4444ARTEM: опа

4444ARTEM: какая?

alisamaxfrolova: посмотри у второго ответа, там все верно

4444ARTEM: понял спо

Universalka: Двойка в числителе, а не в знаменателе.

Universalka: А также x = 0,3 , а не 0,5

Universalka: Опять неверно

Evgenia4836: там и был x=0,3. ошибка была с двойкой. исправлена

Universalka: И двойка была и x = 0,5 было

Evgenia4836: (x+4)/2= 0,5x+2. так было

Автор ответа: Universalka

$\frac{x^{2}+8x+16 }{x+5}*\frac{10+2x}{x+4} =\frac{(x+4)^{2} *2(5+x)}{(x+5)*(x+4)}=2(x+4)\\\\x=0,3\Rightarrow 2*(x+4)=2*(0,3+4)=2*4,3=8,6\\\\Otvet:\boxed{8,6}$

4444ARTEM: а это точно?

Universalka: Что я должна сделать, чтобы это доказать ?

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