Page 60 - DIGITAL BOOK MUHAMMAD AZWARDI NASUTION

U 2 = U 3

U 1 U 2

2
(U 2 ) = U 1 U 3

6 = (10 − b )(10 + b )
2

36 = 100 − b 2

b = 100 − 36 = 64
2

b =  8

b = 8 (BG naik ) , 6 , 2 18