Answer:
(384a+400)
Step-by-step explanation:
4(4a+5)4(4a+5)
first multiply the 4s in (8a+20)(8a+20)
then multiply the two ( )( )
64a+160a+160a+400
combined like terms
Three answers are:
1. 16a+20
2. 12a+20+4a
3. 2(8a+10)
