Question

find the value of x³+y³+12xy-64 if x+y =4

Answer 1

the ans would be zero



mark it brainliest please

Answer 2

x³ + y³ - 12xy + 64
x³ + y³ + 4³ - 3(4xy)       (64 = 4³)
(x + y + 4)(x² + y² + 4²  - xy - 4y - 4x)
x + y = - 4
(- 4 + 4) * (x² + y² + 4²  - xy - 4y - 4x)
0 * (x² + y² + 4²  - xy - 4y - 4x)
= 0