Question

Write the result in standard form a+bi

(-1+4i)(1+i)

Answer 1

-1-i+4i+4i^2
-5+3i

Answer 2

\[(-1+4i)(1+i)\]
\[=-1-i+4i+4i^2\]
\[=-1+3i-4\]
\[=-5+3i\]
\[a=-5,~~ b=3\]