срочно!!!!!!!!!!! Решите системы: 1) xy+5=0 2) 6x+3y=15 5x-y+10=0 x-9y=12. Created by dariatokar. algebra-ru

срочно!!!!!!!!!!! Решите системы: 1) xy+5=0 2) 6x+3y=15 5x-y+10=0 x-9y=12...

July 2022 1 1 Report

срочно!!!!!!!!!!!
Решите системы:
1) xy+5=0 2) 6x+3y=15
5x-y+10=0 x-9y=12

Answers & Comments

sedinalana 1
xy+5=0
5x-y+10=0⇒y=5x+10
x(5x+10)+5=0
5x²+10x+5=0
5(x²+2x+1)=0
5(x+1)²=0
x+1=0
x=-1
y=-5+10=5
(-1;5)
2
6x+3y=15/*3⇒18x+9y=45
x-9y=12
прибавим
19x=57
x=57:19
x=3
3-9y=12
9y=-9
y=-1
(3;-1)

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ravnouskorennym nazyvayut dvizhenie pri kotorom za lyubye ravnye promezhutki vremen

pri kakih znacheniya x i y tochka a 1y i bx6 simmetrichny otnositelno osi abs

srochno v osnovanii pravilnoj piramidy lezhit kvadrat diagonal kotorogo

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