Odpowiedzi

2009-12-14T22:13:59+01:00
-3/4a - 2b - 1/2a + b + 2 = -3/4a - b - 2/4a + 2 = -5/4a - b + 2
2009-12-14T22:13:36+01:00
-[3/4a+2b]-[1/2a-b-2]= -3/4a-2b-1/2a+b+2= -5/4a-b+2

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