X 3 – 144x = x(x 2 – 144) (taking x as common from whole) = x(x – 12)(x + 12) a 2 – b 2 = (a – b)(a + b)

X 3 – 144x =?

X³ – 144x = x(x² – 144) (taking x as common from whole)

= x(x – 12)(x + 12) a² – b² = (a – b)(a + b)