How do i factor 512x^3+343y^3 The second question is how do i factor x^6-19x^3-216

512x^3 + 343y^3

USE FORMULA a^3 + b^3 = ( a+b) ( a^2 -ab + b^2)

( 8x +7y) ( 64x^2 - 56xy + 49y^2) ANSWER

x^6 -19x^3 -216

Let x^3 be = a

a^2 -19a -216

a^2 -27a +8a -216
a ( a -27) + 8( a - 27)

( a+8) ( a-27)

( x^3 +8) ( x^3 -27)

= ( x+2) ( x^2 -2x +4) ( x-3) ( x^2 +3x +9) ANSWER