Question

12.Without actually calculating the cubes, find the value of each of the following:

(a) (-15)3 + (7)3 + (8)3

(b) (20)3 + (-14)3 + (-6)3​

Answer 1

Answer:

a) -2520

b) 5040

Step-by-step explanation:

hope it will be helpful to you

Answer 2

$(a) \: ( - 15)^{3} + {7}^{3} + {8}^{3}$

$= ( - 3375) + (343) + (512)$

$= - 2520$

$b) \: {20}^{3} + { - 14}^{3} + { - 6}^{3}$

$= 8000 + - 2744 + - 216$

$= 5040$