Question

Let f(x, y) = x2 - xy. Determine a simplified expression for f(x, x-y).

Answer 1

And that's x^2

Answer 2

f(x,y) = x^2 - xy
f(x, x-y) = x^2 - x(x-y) = x^2 - x^2 +xy = xy

Answer 3

f(x, x-y) = x^2 - x(x-y) = x^2 - x^2 + xy = xy. Yup, bahrom has it!

Answer 4

Okay so just replace x with x-y? Awesome! Thanks guys.

Answer 5

Replace y with x-y.

Answer 6

Oh, yeah. Gotcha. Thanks so much!