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(-2 )²-(-2)³-2-1=4+8-3=9
Plis o naj
(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
2a²-3 - a²+ 2=
2 (-2)² - 3 - (-2)² +2
2*4-3+4+2=
8-3+4+2=
11