Asked by DUE TOMORROW NEED HELP!

The sum of x and y is 8. What is the maximum value of xy-x^2?

Please help!
Answered by Damon
f = x (y-x)
but y = 8-x
so
f = x (8-2x) = 8x - 2x^2
df/dx = 8 - 4 x
zero when x = 2
There are no AI answers yet. The ability to request AI answers is coming soon!