9x⁴/(x²-2x+1) , 2x³/(x–1)
9x⁴/(x-1)² si 2x³/(x–1) au numitor comun (x-1)²
amplificam a 2-a fractie cu (x-1)
=> 9x⁴/(x-1)² si 2x³(x-1)/(x–1)²
x/(x²+6x+9) , 4x²/(x²–9)
x/(x+3)² , 4x²/[(x–3)(x+3)]
x/(x+3)² si 4x²/[(x–3)(x+3)] au numitor comun (x-3)(x+3)²
amplificam prima fractie cu (x-3) si a doua fractie cu (x+3)
=> x(x-3)/[(x-3)(x+3)²] si 4x²(x+3)/[(x-3)(x+3)²]