Question

question number 2

no smapping

Answer 1

= x ^ 3 - 8 y ^ 3 + 27 z ^ 3 + 18xyz

= ( x )^3 + ( -2 y ) ^3 + ( 3z ) ^ 3 - 3 ( x ) ( -2y ) ( 3 z )

We know that,
 
A ^ 3 + B^ 3 + C ^ 3 - 3ABC = ( A + B + C ) ( A ^2 + B^2 + C^2 - AB - BC -CA)

= [ x + ( -2 y ) + 3z ] [ x^2 + ( -2y ) ^2 + ( 3z )^2 - x ( -2y) - ( -2y ) 3z - ( 3z)x]

= ( x - 2y + 3z ) ( x^2 + 4y^2 + 9z^2 +2xy +6yz- 3zx)

Answer 2

Step-by-step explanation:

In order to change what is on the outside, you must change what is on the inside.. In order to change what is on the outside, you must first change what is on the inside.