tolong bantu saya lagi yaaa teman-teman makasi yaa

2) 5√200 = 5√100•2 = 50√2 (b)

3) √8 = √4•2 = 2√2
√18 = √9•2 = 3√2
√72 = √36•2 = 6√2
√8 + √18 - √72
= 2√2 + 3√2 - 6√2
= (2 + 3 - 6)√2
= -√2 (c)