Question

$(4x - 3)^{3} - (4x + 3) ^{3}$
simplify by formula
[a^3+3a^2b+3ab^2+b^3] - [a^3-3a^2b+3ab^2-b^3]

Answer 1

( 4x- 3 )^3 - ( 4x + 3 )^3

= 64 x^3 - 27 - 144 x^2 + 108 x - 64 x^3 - 27 - 144 x^2 - 108 x

= - 288 x^2 - 54

= - 18 ( 16 x^2 + 3 )

【 hope it helps 】