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madinakoplkopl
@madinakoplkopl
September 2021
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DanikAm
1) х²-5х-5=х-5
х²-5х-5-х+5=0
х²-6х=0
х(х-6)=0
х=0. х-6=0
х=6
2) -2х²+7х=3х
-2х²+7х-3х=0
-2х²+4х=0
х(-2х+4)=0
х=0; -2х+4=0
х=2
3) 2-7х²+1,8х=2-3х
2-7х²+1,8х-2+3х=0
х(-7х+4,8)=0
х=0; -7х+4,8=0
-7х=-4,8
х=4,8/7=0,6857
4)-2х²+5=5-4х
-2х²+5-5+4х=0
х(-2х+4)=0
х=0;. х=2
5) -0,8х²-9,2х=2,1х
-0,8х²-9,2х-2,1х=0
-0,8х²-11,3х=0
х(-0,8х-11,3)=0
х=0;. -0,8х=11,3
х=-113/8=14,125
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Answers & Comments
х²-5х-5-х+5=0
х²-6х=0
х(х-6)=0
х=0. х-6=0
х=6
2) -2х²+7х=3х
-2х²+7х-3х=0
-2х²+4х=0
х(-2х+4)=0
х=0; -2х+4=0
х=2
3) 2-7х²+1,8х=2-3х
2-7х²+1,8х-2+3х=0
х(-7х+4,8)=0
х=0; -7х+4,8=0
-7х=-4,8
х=4,8/7=0,6857
4)-2х²+5=5-4х
-2х²+5-5+4х=0
х(-2х+4)=0
х=0;. х=2
5) -0,8х²-9,2х=2,1х
-0,8х²-9,2х-2,1х=0
-0,8х²-11,3х=0
х(-0,8х-11,3)=0
х=0;. -0,8х=11,3
х=-113/8=14,125