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mahmit2012
 2 years ago
if x+sqrt(x)=1 what is the value of x^2+2x.sqrt(x)
mahmit2012
 2 years ago
if x+sqrt(x)=1 what is the value of x^2+2x.sqrt(x)

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satellite73
 2 years ago
Best ResponseYou've already chosen the best response.1\[x+\sqrt{x}=1\] \[\sqrt{x}=1x\]x^23x+1=0 \[x=12x+x^2\] \[x^23x+1=0\] \[x=\frac{3\sqrt{5}}{2}\] and \[1=(x+\sqrt{x})^2=x^2+2x\sqrt{x}+x\]so \[x^2+2\sqrt{x}=1\frac{3\sqrt{5}}{2}=\frac{23+\sqrt{5}}{2}=\frac{1+\sqrt{5}}{2}\]

nickymarden
 2 years ago
Best ResponseYou've already chosen the best response.1where did you get x^23x+1=0 from? Oo

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.1\[\sqrt{x}=1x\] square both sides get \[x=(1x)^2=12x+x^2\] set equal to zero to solve the quadratic get \[x^23x+1=0\] unless i goofed up

nickymarden
 2 years ago
Best ResponseYou've already chosen the best response.1no, you're right, i just didn't pay attention :P

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.1you really in brazil?!

nickymarden
 2 years ago
Best ResponseYou've already chosen the best response.1so if i sometimes say something wrong in my questions, it's becaus i have to translate them all :)

nickymarden
 2 years ago
Best ResponseYou've already chosen the best response.1yup. all of them :)

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.1why not? i can barely speak one language, and portuguese is way different than english

nickymarden
 2 years ago
Best ResponseYou've already chosen the best response.1yeah but i lived in england for a few years when i was little, so i still remember a few things. The hard part is to know scientific words, but MIT open course helps me with that lol

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.1i bet brazil in nicer than england

nickymarden
 2 years ago
Best ResponseYou've already chosen the best response.1no way, i'm doing everything to go back. where are you from?

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.1going back when you graduate? or sooner?

nickymarden
 2 years ago
Best ResponseYou've already chosen the best response.1sooner, my dad works in reasearch and he knows a lot of people at some universities in england so i might try to get a transfer or something when he goes there to do his Postdoc

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.1good luck! hope you get there soon.
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