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Without finding the cubes, evaluate $(- 12)^{3} + 7^{3} + 5^{3}$ .

Class 9Algebraic IdentitiesPolynomials

A−420
B0
C−1260
D1260

Step-by-Step Solution

−12 + 7 + 5 = 0, so the sum =

3 (- 12) (7) (5) = - 1260

. (−420 forgets the factor 3.)

Answer: C) −1260

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