Practice problem
Simplify: 4i7+i\frac{4i}{7+i}7+i4i
−4+28i48\frac{-4+28i}{48}48−4+28i
4+28i50\frac{4+28i}{50}504+28i
4+28i7−i\frac{4+28i}{7-i}7−i4+28i
4i50\frac{4i}{50}504i
Type a concept, like “slope” or “photosynthesis”.
