What is the maximum value of x3y3 + 3 x*y when x+y = 8?  Select the correct option
A) 4144 B) 4122 C) 455 D) 4189 E) 4156
The question probably be x3.y3+3x∗yx3.y3+3x∗y   Sustitute x = 4 and y = 4   Option 4144
<result>A</result>
What is the maximum value of x3y3 + 3 x*y when x+y = 8?