Odpowiedzi

2010-04-01T09:27:13+02:00
(x-3)(x+3)-(x+3)² = x²-3² - (x²+6x+3²) = x² -9 -x² -6x -9= -18 -6x

:):)
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2010-04-01T09:53:04+02:00
(x-3)(x+3)-(x+3)² =
(x-3)*x-(x-3)*3-(x²+3²)=
x²-3x-3x-9-x²-9=
-6x-18 <- wynik

Jak coś to pisz na pw. :)
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