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