Find the roots of the following quadratic equations by factorisation method.


Given,


441x2 - 42x + 1 = 0


By splitting the middle term,


441x2 - 21x - 21x + 1 = 0


Taking common in the expression,


21x (21x - 1) – 1 (21x - 1) = 0


(21x - 1) (21 x - 1) = 0


21x – 1 = 0 and 21x – 1 = 0


and


2
1