mohonn bantu yaaa..........

b. 25 + 5 akar 6 + 5 akar 6 + 6
= 25 + 10 akar 6 + 6
= 31 + 10 akar 6

c. 9×3 - 3 akar 15 - 3 akar 15 + 5
= 27 - 6 akar 15 + 5
= 32 - 6 akar 15

kalau ga slh itu jwbn'a