Question

помогите: (2h+2)²-(2h)² и (2h+(2h+2))

Answer 1

( 2h + 2)² - (2h)² = 4h² + 8h + 4 - 4h² = 8h + 4 ; 
( 2h + ( 2h + 2 )) = 2h + 2h + 2 = 4h + 2