Square root in 3 seconds - math trick

how to work our uneven sqarue roots like 32

thank you so much

@tecmath what’s the maths behind this trick

Nonononononnoo
No
Square root is not +-. The square root of a number will ALWAYS be positive. Because square root is defined as sqrt(x²) = |x|, x is in module. People often mix this up with a quadratic equation.
If x² = 9, then x = +-3. X has two values.
But sqrt(9) is a single value, 3. It's not -3.

THANKYOU

Man sounds like Code Bullet

bro i cant understand your accent

This method didn’t work for other numbers that I used, such as 1876, any idea why? Also what happens when the number ends in a two three seven or eight when none of the perfect squares match up?

really like your voice man, also thanks for the tip

whot if it ends in 0, for example 340000

MAN I LOVE IT

You sounds a lot like ididathing

I got the answer correct to 576 by pure guessing 😎

I just want to say thank you so so much you don't know how much this means to me for the first time in my life i actually feel so smart in math I have been struggling in math since forever but my gosh with this technique i think i will be able to ace my test really THANK YO SO MUCH btw I already subscribed to your channel

The fact of the video isn’t under three seconds pisses me off

interesting but also irrelevant

amazing thank you

You’re so kine i really thank you about this this make my life easier so much

I just started using this, I can’t seem to get it to work for numbers with more than 4 digits? What am I doing wrong? Also when I calculate the square root with a calculator it gives me a number in decimal form, not a whole number like I’ve worked out?
Also, if the number ends in say a 7, there’s no 7’s in the table. Halp!

actually square root is always positive. root x square is mod x.

Thank you I did a thing

thank you for the help👍❣

square root is a function, so it does not output negative values.

Sure -n^2 = n^2 but this is not reversible.

Square root has a definite range. Which is positive values only (excluding non real values)

This is similar to inverse cos/sin/tan functions.

The input could be sin684pi, which is 0, but the inversesin0 is still 0.

Wut if the last digit end in 3 or 2

What happens if it's 5 6 or 7 digits?

what about root 169
the number can either end with 3 or 7
now 1^2 = 1 and 1x2=2 which is bigger than 1 in 169. so, according to the trick the answer should be 17 but the answer is 13
help me pls

What happens if it ends in 7?

This video was really helpful!! Usually when I'm trying to find square roots I usually use the long division method, but that's really time consuming. These steps were easy to understand and the method's quick to do. Thanks for the great video! :)

My method is another one

Thank you so much! My math teacher taught me this last year and I can’t do it at that time and no one knows this method so no one can teaches me and now I found your video and I finally be able to do this square root trick! Next goal : cube root

Why is this video longer than 3 seconds?

Oh sorry i thought the video meant explaining square root in 3 seconds

Someone else tried to teach this on their YT channel and failed miserably. You DID IT!!!!

Doesnt seem to work with all numbers, unless I make a mistake...

sqrt of 204

a) 4 comes in 2^2 and 8^2 --> so 2 / 4 are my two options
b) I cross the two last digits
c) closest number to 2 is 1 with 1^1
d) next number up from 1 is 2
e) 1 x 2 = 2
d) 2 = 2 (from 204). But this video doesnt talk about when the product of e) equals the first digit of our sqrt number.

that’s such a big number to start with😩 why didn’t u start with 12

what should I do if the number ends in 0??? that's the only doubt I have about this method other than that its great and easy

I've been looking for a quick way to solve these for a very long time, finally, thank you for sharing it too

Teachers make it more complex. But people like you try to make out the easiest way to explain it.

i went to sleep with his voice sir you have a great voice sir

Wow it really is easy to learn. So it really saves time😊😊👍

new party trick unlocked!

How about a number that ends with an odd digit?

599

You dont explain what to do if your number ends with a 0, 2, 7 or 8??? Or does this only work for certain digits

Excellent

i'm so fast now, i'm GOD right now

but that only works in the last digit is 1,4,9, 6, and 5

This is actually so helpful and easy