√125-√80???? Tolong bantu....

√125 = √25x5 = 5√5
√80 = √16x5 = 4√5

maka √125-√80 = 5√5 - 4√5 = √5

semoga membantu:)
maaf jikalau salah:(

√125 - √80
= √25*5 - √16*5
= 5√5 - 4√5
= (5-4)√5
= √5