Odpowiedzi

2010-01-16T17:55:09+01:00
(3x- 2)+ (3x+2) +(3x- 2)² -9(x-2)+ 12=
= 6x+34=
=10½+ 34=
=44½
2010-01-16T18:00:00+01:00
(3x-2)(3x+2)+(3x-2)²-9(x-2)+12x= 9x²-4+(9x²-12x+4)-9x+18+12x=9x²-4+9x²-12x+4-9x+18+12x=18x²-9x+18

18(-1¾)²-9(-1¾)+18=18(-7/4)²-9(-7/4)+18=18(-49/16)+63/4+18=-882/16+15¾+18=-55⅛+15i6/8+18=-55⅛+23i6/8=-31⅜