Jawabanmu

2014-09-05T12:26:56+07:00
√5 - √9.√5
= √5 - 3√5
= -2√5
2014-09-05T12:27:31+07:00
√5-√45=√5-√9x5=√5-3√5=-2√5
jadi hasilnya =-2√5