Given the complex number `z = a + bi`, where `a ∈ R \\ {0}` and `b ∈ R, \ (4zbarz)/((z + barz)^2)` is equivalent to
- `1 + ((text(Im)(z))/(text(Re)(z)))^2`
- `4[text(Re)(z) xx text(Im)(z)]`
- `4([text(Re)(z)]^2 + [text(Im)(z)]^2)`
- `4[1 + (text(Re)(z) + text(Im)(z))^2]`
- `(2 xx text(Im)(z))/([text(Re)(z)]^2)`