Square Roots and Radicals - Let’s find the SUM step-by-step…
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- Опубліковано 10 лют 2025
- How to add square roots and radicals.
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I'm taking the Hiset test, and I have your Table math program, which I completely comprehend. Thank you!
Hi Evette, coming in "cold"; how do We arrive @ 7 x 27 = 189. I know it does, but are there any short cuts to get there?
@@robertakerman3570 Hi Robert. That’s just having that part of the multiplication tables memorized. But there IS an easier way.
ANY number whose individual digits add up to 9 is a factor of 9. 189 does this. (1 + 8 + 9 = 18. 1 + 8 = 9). So you can just divide 189 by 9 and get 21. (18/9 = 2. Carry the 9 from “189” down. 9/9 = 1. Nothing remaining.). Since you know 9 is a perfect square, that’s how to get 3 root 21 also.
@@andrewm6424 Andrew, thanks
@@andrewm6424 Greetings Andrew, there are a lot of "Arith ma Tricks" out there. I'm gonna try to remember Your's.
Because I've been watching your channel, I had enough experience to being able to solve this. Thanks for continuing to making these videos!
First, I went off into the weeds.
Okay .. now I watched enough of the video to see that I should have factored. Let me try.
√189=3√21 2/3 of that is 2√21
14 √3/7=14•√21/7=2√21
I had already worked out 2√84=4√21
so 8√21 makes sense now.
Thank you.
I got this one right and I took algebra in 1972
I missed one thing @2:16 and came up with 6 root 21. I’m giving myself a B-
That makes two of us.
I am 57 and I have yet to use Algebra in anything I have done in life.
Algebra 1 stuff here
30 + 7 = 37 approx
8√21 = 36.6 = 37 approx