Question

Find the value of (-3)³ + (-4)³ + (-5)³.
1. 216
2. -216
3. 225
4. -225

Answer 1

Correct Answer - Option 2 : -216

Given:

(-3)3 + (-4)3 + (-5)3

Concept used:

The cube of any negative number is always negative.

(-N)³ = Negative

Calculation: 

A = (-3)³ = -3 × -3 × -3 = -27

B = (-4)³ = -4 × -4 × -4 = -64

C =  (-5)3 = -5 × -5 × -5 = -125

A + B + C = -(27 + 64 + 125) = -216

∴ The value of A + B + C is -216.