Question

Without actually calculating the cubes evaluate the expression 30³+(-18)³+(-12)³​

Answer 1

Step-by-step explanation:

30³+(-18)³+(-12)³

27000 + (-5832) +(-1728)

27000-5832-1728

19440

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Answer 2

Answer:

19440

Step-by-step explanation:

If a+b+c=0, then a³+b³+c³=3abc,

a=30

b=-18

c=-12

a+b+c=30-18-12=0

therefore 30³+(-18)³+(-12)³=3*30*(-18)*(-12)=19440.