Recent content by Ak94

Great, thanks a lot, I knew I was going wrong somewhere.

Not exactly homework, but this is a problem that a guy posed me.. and we seem to be getting different answers. I'm not entirely sure where either of us is going wrong. Homework Statement A uniform rod of mass M and length L lies on the x-axis, with its ends at x = 0 and x = L. A varying...

I see.. so D = 0 is the only condition.. to everyone who helped out, thanks :)

it's kind of ambigously mentioned in the book, so I'll talk to my teacher about it.., thanks for pointing that out :) So a perfect square number would have to be the square of an integer, but that is not needed for an expression.. ? Also.. I guess D = 0 is still a necessary condition Since...

hm.. 2x2+4x+2=[\sqrt{2}(x+1)]2 and since \sqrt{2} isn't an integer, the expression isn't a perfect square... so that does imply that when D = 0, and coefficient of x2 is a perfect square, we can conclude that the entire quadratic will be one.. ?

Homework Statement What is the condition, for a quadratic function of the form ax2 + bx + c = y to be a perfect square? (x, y are real here) There's a question of this type in a book I'm working with, and I'd just like to have some general conditions for any quadratic... The Attempt...