Question

$5x^{4} -12x^{3} +14x^{2} -12x+5=0$

Answer 1

$5x {}^{4} - 12x {}^{3} + 14x {}^{2} - 12x + 5 = \\ (x - 1) {}^{2} \times (5x {}^{2} - 2x + 5)$