If x+y=4, then find the value of x^3+y^3+12xy-64.

Sir/Madam,
Do the solution on a blank paper

Here is your answer.

Given that, x+y = -4

The formula, x³ + y³ -12xy +64

=> (x + y )³ - 3xy ( x+y) - 12xy + 64

=> (-4)³ - 3xy (-4) - 12xy + 64

=> -64 + 12xy - 12xy + 64

=> 0 [ Answer ]

★Hope it will help you,friend★ :)