Descompunand in factori ireductibili suma x la puterea 4 - x la puterea 2 + 4x-4 se obtine...

Răspuns :


= x² (x²-1) +4(x-1) = x²(x+1)(x-1) +4(x-1) = (x-1)[x²(x+1) +4] = (x-1)(x³+x²+4)