1)x^2+y^2=74 x-y=22)x^2+4y^2=34x+y=73)x^2-2xy-y^2=1x+y=2...

akosi200132 @akosi200132

July 2022 1 3 Report

1)x^2+y^2=74
x-y=2
2)x^2+4y^2=34
x+y=7
3)x^2-2xy-y^2=1
x+y=2

Answers & Comments

migelemerson 1) x^2+y^2=74
X=2+y
(2+y)^2+y^2=74
4+4y+y^2+y^2=74
2y^2+4y-70=0Y^2+2y-35=0D=4+140=144
y1=5
y2=-7 => x1=2+5=7; x2=2+(-7)=-5

2)x^2+4y^2=34
x+y=7
x=7-y
(7-y)^2+4y^2=34
49-14y+y^2+4y^2-34=0
5y^2-14y+15=0
D=196-300=-104
Корней нет
3) x^2-2xy-y^2=1
x+y=2
y=2-xx^2-2x*(2-x)-(2-x)^2=1
x^2-4x+2x^2-4-4x+x^2-1=0
4x^2-8x-5=0
D=64+80=144
x1=2,5; x2=-0,5;
y=2-x => y1=2-2,5=-0,5; y2=2-(-0,5)=2+0,5=2,5

1 votes Thanks 5

More Questions From This User See All

akosi200132 August 2022 | 0 Ответы

komektesinizdersh ottinem 97 men 95 esep

akosi200132 August 2022 | 0 Ответы

x26xy9y216 x y6 pomagite

akosi200132 July 2022 | 0 Ответы

x 2y0x3y5 pomagite srochno na 15 ballov

рекомендуемые вопросы

rarrrrrrrr August 2022 | 0 Ответы

o chem dolzhny pozabotitsya v pervuyu ochered vzroslye pri organizacionnom vyvoze n

danilarsentev August 2022 | 0 Ответы

est dva stanka na kotoryh vypuskayut odinakovye zapchasti odin proizvodit a zapcha

myachina8 August 2022 | 0 Ответы

najti po grafiku otnoshenie v3v1 v otvetah napisano 9 no nuzhno reshenie

ydpmn7cn6w August 2022 | 0 Ответы

Choose the correct preposition: 1.I am fond (out,of,from) literature. 2.where ar...

millermilena658 August 2022 | 0 Ответы

opredelite kak sozdavalas i kto sozdaval arabskoe gosudarstvo v kracii

MrZooM222 August 2022 | 0 Ответы

ch ajtmanov v rasskaze krasnoe yabloko ispolzuet metod rasskaz v rasskaze opi

timobila47 August 2022 | 0 Ответы

kakovo bylo naznachenie kazhdoj iz chastej vizantijskogo hrama pomogite pozhalujsta

ivanyyaremkiv August 2022 | 0 Ответы

pozhalujsta8b98a56c0152a07b8f4cbcd89aa2f01e 97513

sarvinozwakirjanova August 2022 | 0 Ответы

pomogite pozhalusto pzha519d7eb8246a08ab0df06cc59e9dedb 6631

Helpful Links

Политика конфиденциальности

Правила и условия

Контакты

Helpful Social

Copyright © 2024 SCHOLAR.TIPS - All rights reserved.