[tex] {x}^{2} - 2x + 1 = {x}^{2} - x - x + 1 = \\ = x(x - 1) - 1(x - 1) = (x - 1) {}^{2} [/tex]
[tex] {x}^{2} - 5x + 4 = { x }^{2} - x - 4x + 4 = \\ = x(x - 1)-4(x - 1) = \\ = (x - 1) \times ( x - 4)[/tex]
…ᘛ⁐̤ᕐᐷฅ^•ﻌ•^ฅฅ^•ﻌ•^ฅ
