Pls help I suck at math I did understand but completely forgot after like 2 hours help

Answer:
2¾
Step-by-step explanation:
(1/5 + 1/2)² + 3/10 × 5
= (7/10)² + 3/10 × 5
= 7/10 × 7/10 + 3/10 × 5/1
= 49/100 + 15/10
= 49/20 + 3/10
= 49 + 6 = 55/20
= 2 15/20 = 2¾