Without actually calculating the cubes find the value of (17)cube + (-12) cube + (-5) cube
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( 17 )cube +(-12)cube + (-5)cube
17-12-5
17 - 17 =0
x+y+z=0
xcube +y cube + z cube =3xyz
3 (-12)(7)(5)
-36 ×35
-1260
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