What number multiplied by itself equals 15?

Here we will answer: What number multiplied by itself gives 15? In other words, what number times itself will equal 15?

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 = 15
x ≈ 3.873

Square Root Method:
Take the square root of 15 to get the answer:

√15 ≈ 3.873

Exponent Method:
Make the base 15 and the exponent 0.5 to get the answer:

15^0.5 ≈ 3.873

There you go! Now you know how to calculate "What number multiplied by itself equals 15?"

The bottom line is that 3.873 times itself equals approximately 15 as illustrated here:

3.873 x 3.873 ≈ 15

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