How to Calculate a Square Root

This video shows a technique for calculating a square root by hand, without a calculator. It actually calculates each decimal place with perfect precision.

The basis for why this process works is purely algebraic. When I figure this out for cube roots I will post a video on that as well.

Category:

Education

Tags:

• math
• square
• root

[stdoomsayer]

@xCombatArmsHackx Just realize how bad education sucks now days. Step up your game bro.

[djfaadu]

oh thank you sir!!!!!! i thought i would never be able to know it.. it will be comming in my exam and you tought me.. THANK YOU!!!

[XshifaX]

Thank youuuuu! :D

[jonjetjon12]

omg sooooooooo helpful, thanks man



[Hamiltongreatwinner]

Hi, I have tried it with 8, I can't get it to work past the first step. I need to make 40 something times something close to 600, but 9 doesn't get very close at all, what have I done wrong?

[barcakid101]

my brain hurts !!!

[woospoos1111]

Thank u i need this for my icse board exam thanks a lot long live you thaaaaaaannnnnnkkkkkkssssssss a lotttttttt

[Lava1964]

Very good. You explained that far better than the horrible math teach I had in high school.

[Sumbudie]

@UnholyMaulz Thats because he's not saying questions

[paul1964uk]

@6:54 your explain how an irrational (square root) must continue is really clever and elementary and makes the case for teaching the algorithm justified - because you get two ideas for one. (Of course, your mini lectures are really all about 'proof', and its centrality to mathematics, aren't they.)

[inperf3ct]

Thank you! This is coming up in a test about trigonometric functions and I'm going to need this to calculate the length of the hypotenusa of a straight angled triangle. I have a good feeling about this.

[patch26724]

thanks a lot!