Compare to
and find that
, , and
Then substitute in
216 is not a perfect square. However it has a perfect square
36 as a factor for 36*6 is 216. So we write 36*6 instead of 216
Now to take the square root of the product 36*6 by taking individual
square roots of 36 and 6
Now we know the square root of 36 is 6, so we write 6 instead of .
Next we factor 6 out of the top:
Finally we cancel the 6 in the top into the 18 in the bottom
That leaves 3 in the bottom:
Edwin
