Question

Without actually calculating the cubes, find the value of each of the following:
(1) (-12)³+(7)³ +(5)³​

Answer 1

Answer:

-1260

Step-by-step explanation:

(-12)³ +(7)³+(5)³

Let x = -12, y = 7 & z = 5

x + y + z

=

-12 + 7 + 5 = 0

Here,

x+y+z=0

We

know that if,

x +

y + z = 0,

then x³ + y³ + z³ = 3xyz

(-12)³

+ (7)³ + (5)³ = 3(-12)(7)(5) = -1260

Answer 2

Answer:

(-12)³+(7)³+(5)³

answer= first we find (-12)³ = (-1728)

and second we find (7)³ = (343)

and third we find (5)³=125

and solve this question

= (-1728)+343+125

= -1728+468

= -1268