What number multiplied by itself equals 391?

Here we will answer: What number multiplied by itself gives 391? In other words, what number times itself will equal 391?

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 = 391
x ≈ 19.774

Square Root Method:
Take the square root of 391 to get the answer:

√391 ≈ 19.774

Exponent Method:
Make the base 391 and the exponent 0.5 to get the answer:

391^0.5 ≈ 19.774

There you go! Now you know how to calculate "What number multiplied by itself equals 391?"

The bottom line is that 19.774 times itself equals approximately 391 as illustrated here:

19.774 x 19.774 ≈ 391

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