What number multiplied by itself equals 421?

Here we will answer: What number multiplied by itself gives 421? In other words, what number times itself will equal 421?

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 = 421
x ≈ 20.518

Square Root Method:
Take the square root of 421 to get the answer:

√421 ≈ 20.518

Exponent Method:
Make the base 421 and the exponent 0.5 to get the answer:

421^0.5 ≈ 20.518

There you go! Now you know how to calculate "What number multiplied by itself equals 421?"

The bottom line is that 20.518 times itself equals approximately 421 as illustrated here:

20.518 x 20.518 ≈ 421

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