помогите решить систему линейных уравнений2х+5у=20 2х+у=7х-3у=-14 4х^2-y^2=7. Created by Dejdarka. algebra-ru

помогите решить систему линейных уравнений2х+5у=20 ...

July 2022 1 4 Report

помогите решить систему линейных уравнений
2х+5у=20 2х+у=7
х-3у=-14 4х^2-y^2=7

Answers & Comments

evstifeeva07 2(3y-14)+5y = 20 6y-28+5y=20 11y=48    y=48/11
x=3y-14   ⇒ x=3y-14 ⇒ x=3y-14    x = -10/11

y=7-2x y=7-2x    y= 7-2*2 = 3
4x²-(49-28x+4x²)=7 4x²-49+28x-4x²=7 28x = 56 x=2

1 votes Thanks 1

dany okruzhnost tochka na ej i horda otlichnaya ot diametracherez dannuyu tochku p

Answer

Dejdarka July 2022 | 0 Ответы

okruzhnost diametrom kotoroj yavlyaetsya katet pryamougolnogo treugolnika prohod

Answer

Dejdarka July 2022 | 0 Ответы

v pryamougolnom treugolnike avsugol s90gradusov ugol a 30gradusov as 10

Answer

Dejdarka July 2022 | 0 Ответы

v chetyryoh ugolnike abcd abcdugol bacacddokazatchto treugolnik abctreugo

Answer

Dejdarka July 2022 | 0 Ответы

opredelit znak sin 980 cos 786 tg 780 pomogite srochno

Answer

Dejdarka June 2022 | 0 Ответы

pomogite pozhalujsta zadachu ya ne ponyala vot ona postroit ugol vnutri vzyat

Answer

Dejdarka November 2021 | 0 Ответы

cos 60sin90 tg30 ochen srochno

Answer

Answers & Comments

5 najti obratnuyu funkciyu

18 okruzhnosti pomogite

pomogite pozhalujsta dano ugol sov160gradusovnajti ugol sav

dany okruzhnost tochka na ej i horda otlichnaya ot diametracherez dannuyu tochku p

okruzhnost diametrom kotoroj yavlyaetsya katet pryamougolnogo treugolnika prohod

v pryamougolnom treugolnike avsugol s90gradusov ugol a 30gradusov as 10

v chetyryoh ugolnike abcd abcdugol bacacddokazatchto treugolnik abctreugo

opredelit znak sin 980 cos 786 tg 780 pomogite srochno

pomogite pozhalujsta zadachu ya ne ponyala vot ona postroit ugol vnutri vzyat

cos 60sin90 tg30 ochen srochno

рекомендуемые вопросы

Helpful Links

Helpful Social