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So my teacher yesterday taught us this (type of stuff) , 2(radical sign) x^1 = 1 / x^2 . Now she doesnt tell us what this is because to be honest she dosent explain well... Anyhow so today she had us write our perfect squares on a sheet from 1 (1) to 20 (400) and for an example of what she taught us (again not telling us what this is) (radical sign)18 and she had us find the roots? ( 1x18 & 2x9 & 3x6) 1 and 9 are perfect squares the largest was 9 so we did (radical sign)2x9 and the square root fo 9 is 3 so we did 3(radical sign) 2 as our answer and to check we did 3^2x2=18 but now on my homework i have a question that says simplify 4 (radical sign) 18 .... I'm lost, what was I not taught / not understanding? Please and thank you!

- DmAnTuCaN
**Posts:**2**Joined:**Fri Aug 30, 2013 7:42 pm

DmAnTuCaN wrote:So my teacher yesterday taught us this (type of stuff) , 2(radical sign) x^1 = 1 / x^2 . Now she doesnt tell us what this is because to be honest she dosent explain well... Anyhow so today she had us write our perfect squares on a sheet from 1 (1) to 20 (400) and for an example of what she taught us (again not telling us what this is) (radical sign)18 and she had us find the roots? ( 1x18 & 2x9 & 3x6) 1 and 9 are perfect squares the largest was 9 so we did (radical sign)2x9 and the square root fo 9 is 3 so we did 3(radical sign) 2 as our answer and to check we did 3^2x2=18 but now on my homework i have a question that says simplify 4 (radical sign) 18 .... I'm lost, what was I not taught / not understanding? Please and thank you!

Some of what you try to say is wrong, and all of what you try to say needs much notational improvement.

Your first equation, is wrong.

because and

- jg.allinsymbols
**Posts:**71**Joined:**Sat Dec 29, 2012 2:42 am

Some of your pencil-written work on #1 is followable. The steps connected with the arrow make sense.

The #13 is much like what I showed in my previous post, except for having the factor of 4 with square root of 18. Incorporate what I showed and you should be able to do the correct simplification.

Does the circling on #19 mean that you wanted help on that item? Start by factoring the 72, completely just to be clear:

, well that I did not completely factor, but I could have...

The #13 is much like what I showed in my previous post, except for having the factor of 4 with square root of 18. Incorporate what I showed and you should be able to do the correct simplification.

Does the circling on #19 mean that you wanted help on that item? Start by factoring the 72, completely just to be clear:

, well that I did not completely factor, but I could have...

- jg.allinsymbols
**Posts:**71**Joined:**Sat Dec 29, 2012 2:42 am

4 posts
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