Question

Need help solving this math class work I don’t understand it

Answer 1

Given:

`(2+i)/(1-2i)`
`(2+i)/(1-2i)=(2+i)/(1-2i)*(1+2i)/(1+2i)`
`(2+i)/(1-2i)=(2+4i+i-2)/(1+4)`
`(2+i)/(1-2i)=(5i)/(5)`
`(2+i)/(1-2i)=i`