Предмет: Алгебра, автор: Taya200401

az^2-bz^2-bz+az-a+b

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Объём спальных комнат равен 1200 кубических метров, Известно что на каждый кубический метр приходиться 3,4*10^9 частиц пыли. Напишите сколько частиц пыли присутствует во всех спасльнях дома. Ответ запишите в стандартном виде

Ответы

Автор ответа: zhenyaM2002
67
az²-bz² -bz +az -a  +b  = z²(a-b) + z(-b +a) + (-a+b) =
= z²(a-b) +z(a-b) - 1*(a-b) = (a-b)(z²+z - 1)

V сп.комнат  = 1200 м³  = (1,2 *1000 ) м³  = 1,2 * 10³ м³
Во всех комнатах частиц пыли:
1,2 * 10³  * 3,4  * 10⁹  = (1,2*3,4) * 10³⁺⁹  = 4,08 *10¹² (м³) 
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