What number multiplied by itself equals 645?

Here we will answer: What number multiplied by itself gives 645? In other words, what number times itself will equal 645?

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 = 645
x ≈ 25.397

Square Root Method:
Take the square root of 645 to get the answer:

√645 ≈ 25.397

Exponent Method:
Make the base 645 and the exponent 0.5 to get the answer:

645^0.5 ≈ 25.397

There you go! Now you know how to calculate "What number multiplied by itself equals 645?"

The bottom line is that 25.397 times itself equals approximately 645 as illustrated here:

25.397 x 25.397 ≈ 645

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