find the distance from the origin to the point R(m^2-n^2 , 2mn) in simplest form
i got to m^2+2mn-n^2
but i think thats wrong
the answer is m^2 + n^2
Well you can combine with since both terms have the same variables to the same power. There for you add the coefficients:
From there we have:
All we are doing from here is factoring that into:
You can also use substitution if you can't see it right away. Ex: Let
That gets you:
then resubstitute m and n back in:
Either way, you come up with the same answer.