Odpowiedzi

2010-01-12T18:08:57+01:00
A) 2x ( x-5) -3 ( x 2 -2x ) + ( x-2) x =
2X^2 - 10X - 3X^2 + 6X + X^2 - 2X=
-6x

b) a ( a +b+c ) -b ( a-b+c ) -c ( a-b-c) =
a^2 +ab + ac - ab + b^2 - bc - ac +bc + c^2 =
a^2 + b^2 + c^2

c) x ( x2 +2x + 1 ) - ( -4x3 + 8x2 - 6) : 2 =
x^3 + 2x^2 + x + 2x^3 - 4x^2 + 3 =
3x^3 - 2x^2 + x + 3



x^2 = x do kwadratu

x^3 = x do szcześcianu

pozdrawiam :)


11 5 11