Решите систему 2у-х=7 Х²-ху-у²=29. Created by maks2965. algebra-ru

Решите систему 2у-х=7 Х²-ху-у²=29...

August 2022 1 3 Report

Решите систему
2у-х=7
Х²-ху-у²=29

Answers & Comments

kak1234567 X = 2y - 7
(2y - 7)^2 - (2y - 7) - y^2 = 29
4y^2 - 28y + 49 -2y + 7 -y^2 = 29
3y^2 - 30y + 27 =0 /3
y^2 - 10y + 9 = 0
D1 = 25 - 1 × 9 = 16
y1 = 9 y2 = 1

x1 = 2 × 9 - 7 = 11
x2 = 2 × 1 - 7 = -5

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luchshaya procedura chtoby izbavitsya ot fajla dannyh i sdelat ego chrezvychajno tru

2-1=?...

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