Factorize 343 m cube - 216 n cube
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a cube - b cube=(a - b)(a square - b square)
343m cube - 216 n cube=( 7m)cube - (6n)cube
=>(7m -6n)[(7m)square + 7m×6n+( 6n)square]
=>(7m-6n)[49 m square+42mn +36 n square)
343m cube - 216 n cube=( 7m)cube - (6n)cube
=>(7m -6n)[(7m)square + 7m×6n+( 6n)square]
=>(7m-6n)[49 m square+42mn +36 n square)
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