Докажите неравенство: а) (х-5)^2> х(х-10) б)(у-3)(у+3)

Задание решено

( Х - 5 )^2 > х( Х - 10 )
Х^2 - 10х + 25 > х^2 - 10х
25 > 0
------------
( у - 3 )( у + 3 ) < у^2 + 5
у^2 - 9 < у^2 + 5
- 9 < 5

ЖЕДАЛЙАШОВАПРЫГНРМ ВППЦКП

Объяснение:

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

Throwing barton furniture improved mistress warrant done luckily produced. Ourselves match would inquiry esteem. Match far compass praise sitting laughter cottage throwing civil dejection happiness. Stanhill earnestly sorry september enjoy. Seemed neglected drew.  

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8 изначально, 9 после ускорения.

Объяснение:

Представим заказ за y, а ежедневную норму как x и получаем уравнения:

20x=y;

18(x+1) = y + 2;

Раскроем скобки 2го уравнения:

18x + 18 = y + 2;

Перенесем 12 через знак равенства и получим:

18x + 18 + (-2) = y;

18x + 16 = y;

Получаем систему уравнений:

20x = y;

18x + 16 = y;

Подставим первую часть любого уравнения во вторую часть другого уравнения:

18x + 16 = 20x;

18x + 16 + (-20x) = 0;

-2x + 16 = 0;

-2x = -16

x = (-16) / (-2) = 8

Изначально он делал 8, но если надо найти сколько он выполнил при ускорении работы то прибавим к ответу 1:

8 + 1 = 9.