How to Extract the Square Root : Math Answers

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Extracting the square root is something you will undoubtedly have to do time and again during your mathematics career. Extract the square root with help from a mathematics educator in this free video clip.

Expert: Jimmy Chang
Filmmaker: Christopher Rokosz

Series Description: No matter what type of problem you're having when it comes to mathematics, there will always be some rule that will be able to help you out of a bind. Get answers to all of your pertinent math questions with help from a mathematics educator in this free video series.

[ceruleanb]

its 1:00 am and im studying for a test tomorrow. this really helped, i think i finally get it. thank you so much for this!

[kberken]

I'm just impressed that he can write all this stuff backwards.

[AndreaGracie]

I like this much better than the "for dummies" series. Great job. Gets to the point.

[stephanyevaldez]

Bless you Jimmy Chang, short and simple!

[j.klitzkurecamara]

Ok I've been searching on youtube for almost half an hour just trying to find the simplest explanations on extracting the square roots and then I bumped intonthis video and poof I finally understood math (the lesson) that quickly

[marvinsebourn]

The square root of 21 is easily expressed as the square root of 3 times the square root of seven. In my years of math we memorized the square roots of the numbers 1 to 10, so that we can say (to four digits) that the square root of 21 is equal to the square root of three (1.732) times the square root of 7 (2.646), of which the product is 4.583. This product squared (4.583)^2 is 21.004. His explanation skips a couple of much used earlier steps, such as the extraction of square roots by the division process (not by brute force trial and error), and using logarithms.

[iiyorn]

a 2 minute video teaches me more than a 1 hour math class

[donajamora]

YES!!NOW I CAN DO MY HOMEWORK THANK YOU😁😁👍

[beykik]

thank you so much this helped me a lot.

[qqqquito]

The way you write is simply fascinating! It looks as if you were writing the mirror image of what is displayed behind a glass. Is that the case?

[horwinjia]

See nothing compares to an Asian guy teaching u math! Awesome keep it up 👍🏼

[Superminaren]

Finally something useful from eHow...

[hannahmarie]

Thank you for the additional Information!!!

[jryer]

Try this for a very simple approximate square root of any number. Below is example using 21

sqrt(x) = s +((x – y) * 1/(z – y))

1. x = radicand
2. s = Nearest square root, of perfect square, below x
3. y = Nearest perfect square below x
4. z = Nearest perfect square above x

Given: x = 21, s = 4, y = 16, z = 25
Thus: sqrt(21) = 4 + ((21 - 16) * 1/(25 - 16)) = 4.555

Our estimate: 4.555
Actual: 4.582
Diff: .027

Now that's a quick easy way to get a square root of any number with an accuracy of a few thousands. It works for any number, not just natural numbers.

[supersurge]

Let's say I have the square root of 48 it's 2 factors are 4 and 12. 4 is a perfect square (2•2) so what do I do with 12?

[SsvbxxYT]

This is not extracting square roots. It's simplifying them, there's a difference.

[cesarpintes]

Can you teach the viewers how to extract square. roots the old ways the way they teach in the '60s.
Example. What is the square root of √ 245.68?

[johng.]

this is known as SURDS, and it is simplifying a root.

[screammyname]

Can you tell me the solution to *x²+4x+3*

[alfonskambutakahili]

These are simple stuffs guys, please solve for me surds with i and square roots