Question

Evaluate the following using an appropriate identity: (21)3+(−12)3+(−9)3

Answer 1

Answer:

2268^3 is the answer

Step-by-step explanation:

(21)^3+(−12)^3+(−9)^3

21^3-12^3-9^3

2268^3 (by multiplying 21×-12×-9 having same power)

using identity a^3-b^3-c^3=(a×-b×-c)^3