Question

find -12^3+7^3+5^3 by identity

Answer 1

The property states that if the sum of a,b and c is 0 then the value of (a+b+c)³ is equal to the value of 3abc
Here,
a is -12
b is 7
c is 5
Then -12+7+5 = 0

Answer will be 3 * -12 * 7 * 5 = -1260

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Answer 2

-12x12x12 +7x7x7 +5x5x5
-1728 +343 +125 = -1728+468
= -1260