решите....... ............. Created by fnnf102000. algebra-ru

решите..........

fnnf102000 @fnnf102000

October 2021 1 13 Report

решите....... ............

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гюйс

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(6х+4)/3 - (2х-1)/5=(3х+2)/10
50(6х+4) - 30(2х-1)=15*(3х+2)
300х+200 - 60х+30=45х+30
300х-60х-45х=30-200-30
195х= - 200
х= - 200:195=1 1/39

(9х-4)/5 ≥ (6х+2)/3
3(9х-4)≥5(6х+2)
27х-12≥30х+10
27х-30х≥10+12
- 3х≥22
х ≤ -22/3
х ≤ - 7 1/3

(2х-1)(5х+3)=0
10х²+6х-5х-3=0
10х²+х-3=0
D=1+120=121= +-11²
х1=(-11-1)/20= - 12/20= - 6/10= - 0,6
х2=( -11+1)/20= - 10/20= - 0,5

(2х-3)²+14х-9=0
4х²-12х+9+14х-9=0
4х²+2х=0
2х²+х=0
х(2х+1)=0
х1=0
2х+1=0
2х= - 1
х2= - 0,5

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