Factor x2−20x+99x^2 - 20x + 99x2−20x+99.
(x−3)(x−33)(x - 3)(x - 33)(x−3)(x−33)
(x−1)(x−99)(x - 1)(x - 99)(x−1)(x−99)
(x−9)(x−11)(x - 9)(x - 11)(x−9)(x−11)
(x−6)(x−16.5)(x - 6)(x - 16.5)(x−6)(x−16.5)