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2014-04-13T20:13:34+03:00
(x+4)(3x-2)=3x²-2x-12x-8=3x²-14x-8
3(x+1)²=3(x²+2x+1)=3x²+6x+3

3x²-14x-8-3x²-6x-3+11=-20x
-20x  supra 4x³(x+1) *x²(x+1)/1 se simplifica 
-5/x+1 *x(x+1)/1=-5x
1 5 1