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You're talking about "squaring" the number.

When you take a number and multiply it by itself, you've raised it to the power of 2. This is often written as x2

To undo that, you would take the sq. root of the number. This is the same as taking the number to the 1/2 power, that is x1/2there is also a key on your calculator that likely does this. It resembles the long division symbol.

So, if you're finding the number that multiplies to x, you want to find the square root of x. If you have a number and want to find it times itself, then you want to square it.

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12y ago

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