Question

If z=1+2i and z2=3+i then find z,z2

Answer 1

Answer:

your ans

Step-by-step explanation:

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i=√-1 complex number

i^2=-1

i^3=-i

i^4=1

Answer 2

Answer:

here

Step-by-step explanation:

z= 1+2i

z-2i=1 ...........(arranging the equation)...(1) and multiplying the whole equation it by 2 we get

2z -4i= 2 ......(1)

z2-i=3

2z-i =3 ........(2)

subtracting of equation (1) by equation (2)

2z-4i=2

2z -i= 3

- + +

--------------

-5i =5

-5i =5

i= -1

put the value of i on equation (1)

z = 1+2i

= 1+ 2(-1)

= -1