Предмет: Математика, автор: Аноним

СРОЧНООО!!! ДАЮ 30 БАЛЛОВ!!!

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Ответы

Автор ответа: гюйс

3х²= -2х
3х² +2х=0
х(3х+2)=0
х1=0
3х+2=0
3х= -2
х2= - 2/3

9х² -1= -1
9х² =0
х=0

(2х-9)(х+1) =(х-3)(х+3)
2х²+2х -9х -9=х² -9
2х² - х² -7х=0
х²-7х=0
х(х-7)=0
х1=0
х-7=0
х2=7

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