Question

(3x+4)^3-(3x-4)^3 I want answer with full meathod

Answer 1

$\textbf{ Hello Mate! }$

( 3x + 4 )³ = (3x)³ + (4)³ + 3(3x)²(4) + 3(3x)(4)²

= 27x³ + 64 + 108x² + 144x

( 3x - 4 )³ = (3x)³ - (4)³ - 3(3x)²(4) + 3(3x)(4)²

= 27x³ - 64 - 108x² + 144x

27x³ + 64 + 108x² + 144 - ( 27x³ - 64 - 108x² + 144x )

= 128 + 216x²

$\boxed{ Answer : \:216x^2 + 128 }$

Hope it helps