① -³√-1/27 ② ³√-2+3/64

① -³√-1/27 ② ³√-2+3/64
① -³√-1/27 ② ³√-2+3/64

① -³√-1/27 ② ³√-2+3/64
-³√1/27
=-³√(1/3)³
=-1/3
³√(-2+3/64)
=³√(-128/64+3/64)
=³√(-125/64)
=³√(-5/4)³
=-5/4

① -³√-1/27 =-1/3
② ³√-2+3/64 =-5/4