Simplify Square Root of 98640

Here we will show you two methods that you can use to simplify the square root of 98640. In other words, we will show you how to find the square root of 98640 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.

√98640 = A√B

Greatest Perfect Square Factor Method
The Greatest Perfect Square Factor Method uses the greatest perfect square factor of 98640 to simplify the square root of 98640. 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 98640. The factors of 98640 are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 137, 144, 180, 240, 274, 360, 411, 548, 685, 720, 822, 1096, 1233, 1370, 1644, 2055, 2192, 2466, 2740, 3288, 4110, 4932, 5480, 6165, 6576, 8220, 9864, 10960, 12330, 16440, 19728, 24660, 32880, 49320, and 98640. Furthermore, the greatest perfect square on this list is 144 and the square root of 144 is 12. Therefore, A equals 12.

B = Calculate 98640 divided by the greatest perfect square from the list of all factors of 98640. We determined above that the greatest perfect square from the list of all factors of 98640 is 144. Furthermore, 98640 divided by 144 is 685, therefore B equals 685.

Now we have A and B and can get our answer to 98640 in its simplest radical form as follows:

√98640 = A√B

√98640 = 12√685

Double Prime Factor Method
The Double Prime Factor Method uses the prime factors of 98640 to simplify the square root of 98640 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 98640 and then take the square root of that product. The prime factors that multiply together to make 98640 are 2 x 2 x 2 x 2 x 3 x 3 x 5 x 137. When we strip out the pairs only, we get 2 x 2 x 2 x 2 x 3 x 3 = 144 and the square root of 144 is 12. Therefore, A equals 12.

B = Divide 98640 by the number (A) squared. 12 squared is 144 and 98640 divided by 144 is 685. Therefore, B equals 685.

Once again we have A and B and can get our answer to 98640 in its simplest radical form as follows:

√98640 = A√B

√98640 = 12√685

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