If a^1/3+b^1/3 + c^1/3 =0, then

12

If a²+b² + c²-ab-bc-ca =0, then

13

If a + b + c =0, then,   =

15

If a+b+ c =9 and ab + bc + ca = 23, then a²+b² + c²=

16

If a+b+ c =9, then ab+bc+ca=23, then a³+b³ + c³ – 3abc =