I have this expression
Simplify[2 wb Z - 2 w xiR^4 Zb -
2 xiR^2 Sqrt[(wb Z - w xiR^4 Zb)^2/xiR^4]]
which is actually zero when just calculated by hand, with no assumptions needed...
But Simplify
just give the expression back within the brackets. Why is this?
Here in my case, xiR
, w
, wb
, Z
and Zb
are complex-valued, A
is real.
xiR \[Element] Reals
and an assumption about the positivity of(wb Z - w xiR^4 Zb)
. $\endgroup$