PatriciaMann
New member
- Joined
- Jul 12, 2011
- Messages
- 1
Multiply and Simplify
the square root of 8 times the square root of 40
the square root of 8 times the square root of 40
PatriciaMann said:Multiply and Simplify
the square root of 8 times the square root of 40
Subhotosh Khan gave you an example. Let's generalize that example to ANY positive numbers.Subhotosh Khan said:PatriciaMann said:Multiply and Simplify
the square root of 8 times the square root of 40
\(\displaystyle \sqrt{8} * \sqrt{32} \ = \ \sqrt{8*32}\)
Now continue....
Please share your work with us, indicating exactly where you are stuck - so that we may know where to begin to help you.
Boy, poor Patricia asked a simple question!PatriciaMann said:Multiply and Simplify
the square root of 8 times the square root of 40
Denis said:sqrt(8) * sqrt(40) = sqrt(8 * 40) = sqrt(320)
Note that 64 * 5 = 320
sqrt(320) = sqrt(64 * 5) = 8*sqrt(5)
AGREE 100% Mark.mmm4444bot said:
How 'bout this factoring:Denis said:sqrt(8) * sqrt(40) = sqrt(8 * 40) = sqrt(320)
Note that 64 * 5 = 320
sqrt(320) = sqrt(64 * 5) = 8*sqrt(5)
sqrt(8) * sqrt(40) = sqrt(8) * sqrt(8*5) = sqrt(8^2*5) = 8sqrt(5)
Does not require knowing 320 = 5*64
Denis said:for us to post stuff that's way beyond what she's been exposed to is a loss of time. I do not think that anyone tried to go beyond what was requested of the student. She was asked to multiply and simplify and so there were two parts to her question. As to explaining the formula, I suspect that competence using it is improved by understanding it as well as memorizing it.
I respect everybody's opinions here, but if not same as mine, than they're wrong You have taken the words right out of my mouth. I respect your opinion, but, not being mine, it is wrong.
Subhotosh, have another look at your post...then head for the corner... Je pense que c'est vous, mon ami, qui faut aller au coin. Subhotosh a donne un example. Pardon my French; I may need to go to the language corner. Le coin, la coin? Are "coin" and "faut" even the right words? Un example, une example? Once in France, I explained that I did not want to tirer le voiture a nuit when I meant that I did not want to conduire le voiture a nuit. People thought that my nocturnal aversions were provincial and looked at me quite oddly.[/quote]
mmm4444bot said:How 'bout this factoring:
sqrt(8) * sqrt(40) = sqrt(8) * sqrt(8*5) = sqrt(8^2*5) = 8sqrt(5)
Does not require knowing 320 = 5*64
Denis said:mmm4444bot said:
Subhotosh, have another look at your post...then head for the corner... Subhotosh a donne un example.