A real value of x-satisfies the equation...

A real value of x-satisfies the equation `(frac{3-4ix}{3+4ix})` = `alpha` - i `beta`, if (`alpha`, `beta` `in` R) if `alpha^2`+`beta^2` =

A

`(alpha)^2-(beta)^2 = -1`

B

`(alpha)^2-(beta)^2 =1`

C

`(alpha)^2+(beta)^2=1`

D

`(alpha)^2-(beta)^2=2`

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