Question

factories:(x²-2x)²-23(x²-2x)+120​

Answer 1

Answer:

$let \: {x}^{2} - 2x = y \\ {y}^{2} - 23y + 120 \\ {y}^{2} - 15y - 8y + 120 \\ y(y - 15) - 8(y - 15) \\ (y - 15)(y - 8) \\ ({x}^{2} - 2x - 15)( {x}^{2} - 2x - 8)$