Question

without actually calculating the cubes find the value of each of the following=(-12)3 +(7)3 + (5)3​

Answer 1

(-12)³+(7)³+5³

=(-12+7+5){(-12)²+(7)²+(5)²+(12*7) - (7*5) +(12*5)}

=0{(-12)²+(7)²+(5)²+(12*7) - (7*5) +(12*5)}

=0