Question

Compute (1 + i)(2 + i)(3 + i).

Answer 1

10i

Explanation:

multiply the parentheses

to get (2+i+2i+i^2) x (3+i)

i^2=-1

(2+i+2i-1) x (3+i)

collect like terms (1+3i) x (3+i)

multiply this out

3+i+9i+3i^2

3+10i+3(-1)

3+10i-3

10i