Oblicz iloczyn pierwiastków równania
[tex](x^{2} - 25 ) (2x -7 ) = 0[/tex]


Odpowiedź :

[tex](x^{2}-25)(2x-7) = 0\\\\(x+5)(x-5)(2x-7) = 0\\\\x+5 = 0 \ \vee \ x-5 = 0 \ \vee \ 2x - 7 = 9\\\\x = -5 \ \vee \ x = 5 \ \vee \ x = 3,5\\\\x \in \{-5; 3,5; 5\}\\\\Iloczyn \ pierwiastkow \ rownania:\\\\-5\cdot3,5\cdot5 = -87,5[/tex]