2p2 - 10pq + 25q2 does not have any real factors.
The discriminant = (-10)2 - 4*2*25 = 100 - 200 = -100 is less than 0. The only factors, therefore, are in the complex field.
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3v2 + 9v = 3v(v + 3)
(9x - 1)(9x - 1)
(x - 4)(3x - 2)
x2 - 22x + 121 = (x - 11)2
Divide all terms by 3 and it is: (2x-1)(x+2)