i enter this equation into a calculator it work but not in this app
here is the question
2x^2 + 3xy -4y^2
so in the app i put
x:=2
y:=-4
2x^2 + 3xy -4y^2
answer I get is when i press go
8 + 3xy -64
why does this app not solve it all
What do I have to do, wish there was a download of all the things you can do because trying to find something on this is to darn hard.
thanks all
