What number multiplied by itself equals 409?

Here we will answer: What number multiplied by itself gives 409? In other words, what number times itself will equal 409?

We have identified many different ways of getting the answer to this question:

Algebra Method:
Make an algebra equation and solve for x:

x • x = 409
x ≈ 20.224

Square Root Method:
Take the square root of 409 to get the answer:

√409 ≈ 20.224

Exponent Method:
Make the base 409 and the exponent 0.5 to get the answer:

409^0.5 ≈ 20.224

There you go! Now you know how to calculate "What number multiplied by itself equals 409?"

The bottom line is that 20.224 times itself equals approximately 409 as illustrated here:

20.224 x 20.224 ≈ 409

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The answer on this page is rounded to the nearest thousandth, if necessary.