## College Algebra (11th Edition)

$E=260+20i$
Plug in the given values to the formula $E=IZ$. $E=(20+12i)(10-5i)$ Expand. $E=200-100i+120i-60i^2$ Note $i^2=-1$ and combine like terms. $E=(200+60)+(-100+120)i$ $E=260+20i$