so-x & gt； 0

Then f (-x) =-x (1-(-x)) =-x (1+x) =-f (x)

while

When x>0

So-x

Then f(-x)=-x( 1-x)=-f(x)

So this is a strange function.

Or simply.

f(2)=2( 1-2)=-2

f(-2)=-2( 1-2)=2

That is, f(2)=-f(-2)

So this is a strange function.