Simplify Square Root of 78736

Here we will show you two methods that you can use to simplify the square root of 78736. In other words, we will show you how to find the square root of 78736 in its simplest radical form using two different methods.

To be more specific, we have created an illustration below showing what we want to calculate. Our goal is to make "A" outside the radical (√) as large as possible, and "B" inside the radical (√) as small as possible.

√78736 = A√B

Greatest Perfect Square Factor Method
The Greatest Perfect Square Factor Method uses the greatest perfect square factor of 78736 to simplify the square root of 78736. This is how to calculate A and B using this method:

A = Calculate the square root of the greatest perfect square from the list of all factors of 78736. The factors of 78736 are 1, 2, 4, 7, 8, 14, 16, 19, 28, 37, 38, 56, 74, 76, 112, 133, 148, 152, 259, 266, 296, 304, 518, 532, 592, 703, 1036, 1064, 1406, 2072, 2128, 2812, 4144, 4921, 5624, 9842, 11248, 19684, 39368, and 78736. Furthermore, the greatest perfect square on this list is 16 and the square root of 16 is 4. Therefore, A equals 4.

B = Calculate 78736 divided by the greatest perfect square from the list of all factors of 78736. We determined above that the greatest perfect square from the list of all factors of 78736 is 16. Furthermore, 78736 divided by 16 is 4921, therefore B equals 4921.

Now we have A and B and can get our answer to 78736 in its simplest radical form as follows:

√78736 = A√B

√78736 = 4√4921

Double Prime Factor Method
The Double Prime Factor Method uses the prime factors of 78736 to simplify the square root of 78736 to its simplest form possible. This is how to calculate A and B using this method:

A = Multiply all the double prime factors (pairs) of 78736 and then take the square root of that product. The prime factors that multiply together to make 78736 are 2 x 2 x 2 x 2 x 7 x 19 x 37. When we strip out the pairs only, we get 2 x 2 x 2 x 2 = 16 and the square root of 16 is 4. Therefore, A equals 4.

B = Divide 78736 by the number (A) squared. 4 squared is 16 and 78736 divided by 16 is 4921. Therefore, B equals 4921.

Once again we have A and B and can get our answer to 78736 in its simplest radical form as follows:

√78736 = A√B

√78736 = 4√4921

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