4243.sagews

z=(-1/5)+(7/5)*I

bool((2-I)*z+(3+2*I)==(4+5*I))

True

z=(-11/5)-(2/5)*I

bool((-1+2*I)*z-(1-3*I)==(2-I))

True

n((-I)^(1/4))

0.923879532511287 - 0.382683432365090*I

n(cos((3*pi/8))+sin((3*pi/8))*I)

0.382683432365090 + 0.923879532511287*I

n(cos((3*pi/8)+(pi/2))+sin((3*pi/8)+(pi/2))*I)

-0.923879532511287 + 0.382683432365090*I

n(cos((3*pi/8)+(2*pi/2))+sin((3*pi/8)+(2*pi/2))*I)

-0.382683432365090 - 0.923879532511287*I

n(cos((3*pi/8)+(3*pi/2))+sin((3*pi/8)+(3*pi/2))*I)

0.923879532511287 - 0.382683432365090*I