Express the following complex numbers in the standard form `a+i b :(1/(1-4i)-2/(1+i))((3-4i)/(5+i))`

Explanation

Given that,


`(1/(1-4i)-2/(1+i))((3-4i)/(5+i))`


`=[(1-i-2+3i)/((1-4i)(1+i) )] [(3-4i)/(5+i)]`


`=[(-1+9i)(3-4i)]/[(1+4-3i)(5+i)]`


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