Factorise 27a^3-b^3+8c^3+18abc
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let x be 3a
y be -b
z be 2c
we get the same equation but in terms of x y z as : x³+y³+z³-3xyz
this is a famous form and gets factored to
(x+y+z)(x²+y²+z²-xy-yz-zx)
now resub the values of x y z
y be -b
z be 2c
we get the same equation but in terms of x y z as : x³+y³+z³-3xyz
this is a famous form and gets factored to
(x+y+z)(x²+y²+z²-xy-yz-zx)
now resub the values of x y z
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