Odpowiedzi

2010-01-14T16:48:37+01:00
-3(3x-2y)+2(x-2y)= -9x + 6y + 2x - 4 y = -7x + 2y
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2010-01-14T16:53:46+01:00
-3(3x-2y)+2(x-2y)+-9x+6y+2x-4y=-7x+2y
2010-01-14T17:17:31+01:00
-3(3x-2y)+2(x-2y)= -9x + 6y + 2x - 4y = -7x +2y