Question

Without actually calculating the cubes,find the value od the following:-

(i)(-12)3+(7)3+(5)3

Answer 1

Answer:

let a= -12

b= 7

c= 5

a+b+c= -12+7+5= 0

if a+b+c=0 then (a)3+(b)3+(c)3=3abc

so (-12)3+(7)3+(5)3= 3*-12*7*5

= -1260

Step-by-step explanation: