Question

without actual multiplication,find the value of -
1) (-12)^3 +( 7)^3 + (5)^3
​

Answer 1

given :- (-12)³ + (7)³ + (5)³

using identity, a³ + b³ + c³ = 3abc

here,

a = -12, b = 7 and c = 5

therefore (-12)³ + (7)³ + (5)³ = 3(-12)(7)(5)

= 3(-420)

= -1260 ( final answer )