Jawabanmu

2014-02-20T09:52:03+07:00
= √(5x - 1)² - √(25x² + 5x - 7)
= √(25x² - 10x + 1) - √(25x² + 5x - 7)
= (-10 - 5) : 2√25
= -15 : 10
= -3/2