Factorize:
1 – 6x + 9x2
Given,
1 – 6x + 9x2 = 9x2 – 6x + 1
By using the formula (a – b)2 = a2 – 2ab + b2
We get,
= (3x)2 – 2 × (3x) × 1 + (1)2
= (3x – 1)2