Answers

2016-08-03T22:29:26+08:00
Let x ...be the first even integer
    x+2 ..2nd;
   x+4...3rd
--------------;

x[x+2][x+4]= 421;

x[x^2 +6x +8]=421;

x^3 +6x^2 +8x=421;

421 has no possible combination factor..^-^


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