Factorise: 343 x³ – 64 y³ + 125 z³ + 420xyz
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Step-by-step explanation:
Formula (a+b+c)³ =(a)³+(b)³+(c)³+ 3*a*b*c
= 343x³-64y³+125z³+420zxyz
(7x)³+(-4y)³+(5z)³+3*7x*-4y*5z
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