Factorize:
64x3 – 343
We know that,
a3 - b3 = (a - b) (a2 + a × b + b2)
Using this formula, we get
= (4x)3 – (7)3
= (4x - 7) [(4x)2 + 4x (7) + (7)2)
= (4x – 7) (16x2 + 28x + 49)