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doroxova04
@doroxova04
July 2022
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Решите пожалуйста пример через дискриминант
(5x+1)^2+6(5x+1)-7=0
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whynothrv
Пусть у=5х+1
у²+6у-7=0
D = 36 +4*7=64=8²
y=(-6-8)/2=-7 или y=(-6+8)/2=1
5x+1=-7 или 5х+1=1
х= -8/5 или х=0
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Answers & Comments
у²+6у-7=0
D = 36 +4*7=64=8²
y=(-6-8)/2=-7 или y=(-6+8)/2=1
5x+1=-7 или 5х+1=1
х= -8/5 или х=0