how do you do 4./5

Question

how do you do 4./5

katielong · Answer

$$4\sqrt{5}$$

jhonyy9 · Answer

= sqrt((16*5) = sqrt80

katielong · Answer

what does it mean? what does the 4 stand for?

jhonyy9 · Answer

what do you wann to do with again ?

katielong · Answer

i dont understand why the 4 is there and what it all means or how too solve it :L

jhonyy9 · Answer

sqrt sign squareroot what you can writing like exponent too in the form of 

 sqrt(x) = x^(1/2)

jhonyy9 · Answer

so when there is 4sqrt5 so this sign that you can put inside squarrott the number 4 if you make the 4 on exponent 2 what is 16 and now if you take it inside squarroot there will get 5*16 =80

anonymous · Answer

Initially it would've been $$\sqrt{80}$$
which can be written as $$\sqrt{16\times5}$$
since we know dat the $$\sqrt{16}$$ is 4,
then it can be written as $$4\sqrt{5}$$

anonymous · Answer

u get it right? i mean if u dnt i'll try something simpler

katielong · Answer

no thats perfect, thanks :)