Odpowiedzi

2009-12-09T16:28:46+01:00
(2a-3) (a+1) - (a+1) (a²-2) = 2a²+2a-3a-3-a³+2a-a²+2=a²-a³+a-1=
(-2 )²-(-2)³-2-1=4+8-3=9

Plis o naj
1 5 1
2009-12-09T16:29:39+01:00
A= -2

(2a-3) (a+1) - (a+1) (a²-2) =
2a²+2a-3a-3 -a³-2a-a²+2=a²-3a-a³-1
(-2)²-3*(-2)-(-2)³-1=4+6+8-1=17
1 3 1
2009-12-09T16:42:20+01:00
(2a-3) (a+1) - (a+1) (a²-2)=
2a²-3 - a²+ 2=
2 (-2)² - 3 - (-2)² +2
2*4-3+4+2=
8-3+4+2=
11
1 4 1