bantu kerjain ya kak

( (√2) - 2) / (√2)
= ( (√2) - 2)(√2)) / (√2)(√2)
= ( 2 - 2√2) / 2
= 1 - √2

b.

³log 175
= ³log (5² . 7)
= 2 . ³log 5 + ³log 7
= 2p + q

b.

2(3x + 9) / 3 = 7x + 16
6x + 18 = 21x + 48
18 - 48 = 21x - 6x
15x = -30
x = -2

a