tolong jawabkan soal ini kak

= 2(√5 - 1) - 8 / (√5 - 1)
= ( 2√5-1)(√5-1) - 8) /(√5 - 1)
= ( 2 (5 - 2√5 + 1) - 8) / (√5 - 1)
= ( 12 - 4√5 - 8) / (√5 - 1)
= (4 - 4√5) / (√5 - 1)
= -4(√5 - 1) / (√5 - 1)
= -4

Semoga berguna +_+