If a + 2 b equal to -3 C then prove that a cube + 8 b cube + 27 C cube equal to 18 ABC
harshmakwana505:
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Given, a+2b=-3c
=>a+2b+3c = 0
Here,x+y+z=0
So, x³+y³+z³=3xyz
=>(a)³+(2b)³+(3c)³= 3*a*2b*3c
=18abc
Hence, Proved.
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