Answer:
2(2x + 5)(2x - 5)
Step-by-step explanation:
2(2x + 5)(2x - 5)
= (4x + 10)(2x - 5)
= 8x² - 20x + 20x - 50
= 8x² - 50
8/5 miles per hour [edit]
First you do 4 * 3y then 4 *5 and you get 12y + 20
I tried to answer these earlier but something glitched out. Hope this helps :)