Question 67875
Simplify:
5 sqrt5 - sqrt 20
:
Writing it like this may help:
5*SqRt(5) - SqRt(4*5)
:
Note that you can extract the SqRt of 4, which is 2, then you have:
5*SqRt(5) - 2*SqRt(5)
:
Since they are both the SqRt(5) now, just do the arithmetic 5 - 2:
3*SqRt(5)