Question

If y = 1 + i, then y3 − 3y2 + (____) − 1 = -i .
pls help

Answer 1

replace the space with a variable

\[y^{3}-3y^{2}+x-1=-i\]
y=1+i

substitute it in
\[(1+i)^{3}-3(1+i)^{2} + x - 1 = -i\]

and solve for x