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skidan2002
@skidan2002
August 2022
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гюйс
Verified answer
Х²(х+1)=9(х+1)
х²=9
х=±3
х≠0, х≠±1
16(х-1)-6(х+1)=(х+1)(х-1)
16х-16-6х-6=х²-1
х² - 10х+21=0
D/4=5² - 21=4 (±2)
х1=5-2=3
х2=5+2=7
3=4х-16
4х=19
х=4,75
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Answers & Comments
Verified answer
Х²(х+1)=9(х+1)х²=9
х=±3
х≠0, х≠±1
16(х-1)-6(х+1)=(х+1)(х-1)
16х-16-6х-6=х²-1
х² - 10х+21=0
D/4=5² - 21=4 (±2)
х1=5-2=3
х2=5+2=7
3=4х-16
4х=19
х=4,75