sqrt(81)/49

<-- Enter expression (use sqrt for square root)

Simplify √81/49

Simplify √81.

If you use a guess and check method, you see that 82 = 64 and 102 = 100.
Since 64 < 81 < 100 the next logical step would be checking 92.

92 = 9 x 9
92 = 81 <--- We match our original number!!!
Therefore, √81 = ±9

Therefore, we can factor out 9 from the radical, and leave under the radical

We can factor out the following portion using the highest even powers of variables:
81 = = 9

We can factor out the following portion using the highest even powers of variables:
1 = = 1

Multiply by outside constant of 49 to get our final answer:
49 x 1 = 49

Build our simplified fraction:
9
1