+0  
 
0
112
2
avatar+558 

Factor.

 

SamJones  Jan 27, 2018
 #2
avatar+7096 
+3

64x12 + 27y3   =   ( 4x4 )3  +  ( 3y )3

 

This is a sum of cubes.   a3 + b3   =   (a + b)(a2 - ab + b2)

 

( 4x4 )3  +  ( 3y )3

 

=   ( 4x4 + 3y )( (4x4)2 - (4x4)(3y) + (3y)2 )

 

=   ( 4x4 + 3y )( 16x8 - 12x4y + 9y2 )

hectictar  Jan 27, 2018

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