Предмет: Математика, автор: biman94

помогите решить пожалуйста a) -5x^2=1/20 б)x^3-3x=0 в)x^3-11x=0

Ответы

Автор ответа: lDDEXTERRl

0

а)-5х²=1/20
х²=1/20:(-5)
х²=-0,25
_________
Ошибка:
(любое отрицательное число под квадратом положительное)

б)х³-3х=0
х(х²-3)=0
х²-3=0
х²=3
х=±√3
_________
Ответ:±√3

в)х³-11х=0
х(х²-11)=0
х²-11=0
х²=11
х=±√11
___________
Ответ:±√11

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