Odpowiedzi

2010-02-15T20:45:57+01:00
2a+3-a+6+7a= 8a +9 = -2*8 + 9 = -16 + 9 = -7
1 5 1
2010-02-15T20:47:48+01:00
2010-02-15T20:50:22+01:00
2a + 3 - a + 6 + 7a = 2 * -2 + 3 + 2 + 6 + 7 * -2 = -4 + 11 + (-14) = 11 - 18 = -7
Czy tak? xD