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Sillysidley
10-22-2006, 12:12 PM
Find 2x+5 if x satisfies sqrt(40-9x)-2sqrt(7-x)=sqrt(-x)

I'm stuck:icon_crying: HElP!!!:icon_biggrin:
Mr. Hui
10-22-2006, 12:26 PM
First, square both sides to remove complex (imaginary) numbers.

Then, solve equation for x. It involves manipulating radicals.
Mr. Hui
10-22-2006, 03:48 PM
Radicals are expression involving the square root symbol.
Sillysidley
10-25-2006, 03:17 PM
Is x=1??????

Thanks for the help
Sillysidley
10-25-2006, 03:18 PM
Whoops, didn't read the question.

Is the answer to the problem 7?
Mr. Hui
10-25-2006, 06:48 PM
No, if you plug in x = 7, you won't get the two sides equal. I will provide you with a complete solution.
Sillysidley
10-25-2006, 07:57 PM
I made a mistake

it should be something like 40-9x+7+x+2sqrt...
Mr. Hui
10-26-2006, 08:20 PM
As promised, here is the completely worked out solution.

Click to enlarge
Alex a.k.a whiteboy
10-26-2006, 09:25 PM
wtf dont show that again
puppydog
10-30-2006, 04:55 PM
show what??
Alex a.k.a whiteboy
10-31-2006, 06:43 PM
uhhh he shown the answer and how he got it and it was like 5 feet long lol
Alex a.k.a whiteboy
11-04-2006, 09:20 PM
omfg durr lol:icon_xd: srry
Sillysidley
11-05-2006, 08:10 AM
that answer is right!!!!!!!

Thanks Mr. Hui
Mr. Hui
11-05-2006, 01:42 PM
that answer is right!!!!!!!

Thanks Mr. Hui

You're welcome. I'm nice like that. :cool:
Sillysidley
11-05-2006, 07:50 PM
can anyone look at my other thread in this part
puppydog
11-05-2006, 08:02 PM
i dont know i will try.
Alex a.k.a whiteboy
11-05-2006, 10:09 PM
ya
Scion
04-05-2007, 08:55 PM
we ddid its hard though
jmw106462
03-17-2010, 07:21 PM
Wow, That attachment is very long. :lol: