Multiply the complex numbers:
(3+4i)(2+8i).
-24+30i
26+32i
-26-32i
22+32i
-26+32i
Expand the following expression:
(f + 4) (f – 4)
f2 + 16
f2 – 4f – 16
2f – 4f – 16
f2 – 16
f2 + 4f – 16
