What number multiplied by itself equals 390?

Here we will answer: What number multiplied by itself gives 390? In other words, what number times itself will equal 390?

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 = 390
x ≈ 19.748

Square Root Method:
Take the square root of 390 to get the answer:

√390 ≈ 19.748

Exponent Method:
Make the base 390 and the exponent 0.5 to get the answer:

390^0.5 ≈ 19.748

There you go! Now you know how to calculate "What number multiplied by itself equals 390?"

The bottom line is that 19.748 times itself equals approximately 390 as illustrated here:

19.748 x 19.748 ≈ 390

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