325=5X65=5X5X13=5²X13,所以√325=√(5²X13)=√(5²)X√13=5X√13=5√13.这是解题的过程，你问的不知所谓.
325= 5x5x13√325=√(5x5x13)=√(5x5)x√13=5x√13=5√13
√325=√(13*5^2)=5√13
