Предмет: Математика, автор: Леха0012

Пастух приобрел прямоугольный загон площадью 21 546 м , ширина которого на 75 метров меньше длины. Сколько метров забора ему нужно построить, чтобы огородить свой участок?

Ответы

Автор ответа: vmaluga2011
0
х - ширина
х+75 - длина
х(х+75)=21546
х2+75х-21546=0
D=75*75-4(-21546)=5625+86184=91809  Корень из D=303
х(1)=(-75-303):2=-378:2=-189 (не подходит)
х(2)=(-75+303):2=228:2=114 (м) ширина
114+75=189 (м) длина участка
Р=2(114+189)=2*303=606 (м)
Ответ: нужно построить 606 м забора
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Информатика, автор: pilel
Приведите два примера графической информационной модели для отображения процессов
5 лет назад
Предмет: Английский язык, автор: MetroEfem
A - Which sentences are correct?
1) Which sentence is correct?
a) There's a fly in your soup, is there?
b) There's a fly in your soup, isn't it?
c) There's a fly in your soup, isn't there?
2) Which sentence is correct?
a) I think he's from India, doesn't he?
b) I think he's from India, don't I?
c) I think he's from India, isn't he?
3) Which sentence is correct?
a) Don't talk to Peter during the lesson, do you?
b) Don't talk to Peter during the lesson, will you?
c) Don't talk to Peter during the lesson, won't you?
4) Which sentence is correct?
a) Let's go swimming, aren't we?
b) Let's go swimming, isn't it?
c) Let's go swimming, shall we?
5) Which sentence is correct?
a) Pass me the salt, aren't I?
b) Pass me the salt, aren't you?
c) Pass me the salt, won't you?
6) Which sentence is correct?
a) The sun won't shine tomorrow, will it?
b) The sun won't shine tomorrow, will she?
c) The sun won't shine tomorrow, won't it?
7) Which sentence is correct?
a) We had better leave, hadn't we?
b) We had better leave, haven't we?
c) We had better leave, weren't we?
8) Which sentence is correct?
a) We must be at school at 8 o'clock, aren't we?
b) We must be at school at 8 o'clock, mustn't we?
c) We must be at school at 8 o'clock, needn't we?
9) Which sentence is correct?
a) The slide show was fantastic, isn't it?
b) The slide show was fantastic, was it?
c) The slide show was fantastic, wasn't it?
10) Which sentence is correct?
a) They used to live in New Orleans, aren't they?
b) They used to live in New Orleans, didn't they?
c) They used to live in New Orleans, don't they?
5 лет назад
Предмет: История, автор: elizabetmuhametsina
напиши рассказ по данному рисунку​
5 лет назад
Предмет: Литература, автор: 14белочка
Сопоставьте отношение генерала и Пугачева к любовному чувству Гринёва
9 лет назад
Предмет: География, автор: Аноним
Целюлозная-бумажная промышленность в республике Корелия представлена несколькими предприятиями. Какие особенности природно-ресурсной базы обусловили размещение на территории Корелии целюлозно-бумажных комбинатов
9 лет назад