Предмет: Математика, автор: alexsupper308

2x²+3x-9=0 какой ответ ​

Ответы

Автор ответа: maxbel0603
0

Ответ:

2x^²-3x-9=0

D= (-3)^²-4•2•(-9)= 9+72=81

x1= (-(-3) +√81):(2•2)=3

x2=(-(-3)-√81):(2•2)=-1,5

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