Question

Why do we write √45 as 5√5?

Answer 1

Answer:

See below

Step-by-step explanation:

√45=√9*5=3√5

So it should be 3√5 not 5√5

5√5= √25*5=√125

Answer 2

Answer:

If you divide 45 by 5 you get the other factor 9 which means√9*√5 we know that 9 is 3 squared so we can just write it as 3√5