Practice problem
Evaluate: (i)(9−i)(i)(9-i)(i)(9−i)
1+9i1+9i1+9i
1−9i1-9i1−9i
−1+9i-1+9i−1+9i
−1−9i-1-9i−1−9i
Type a concept, like “slope” or “photosynthesis”.
