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AinurB
@AinurB
July 2022
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решите уравнение [tex]42=/7 x^{2} +7x/[/tex]
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99tasha
Verified answer
7х²+7х=42 |:7
х²+х-6=0
Д=1+24=25
х1=(-1+5)/2=2
х2=(-1-5)/2= -3
7х²+7х= -42 |:7
х²+х+6=0
Д=1-24=-23 - нет решений
Ответ:
х1=2, х2= -3
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Answers & Comments
Verified answer
7х²+7х=42 |:7х²+х-6=0
Д=1+24=25
х1=(-1+5)/2=2
х2=(-1-5)/2= -3
7х²+7х= -42 |:7
х²+х+6=0
Д=1-24=-23 - нет решений
Ответ:х1=2, х2= -3