XP Math Games Arcade

**Sillysidley** · 10-22-2006

Find 2x+5 if x satisfies sqrt(40-9x)-2sqrt(7-x)=sqrt(-x)

I'm stuck

HElP!!!

Mr. Hui · 10-22-2006

First, square both sides to remove complex (imaginary) numbers.

Then, solve equation for x. It involves manipulating radicals.

Mr. Hui · 10-22-2006

Radicals are expression involving the square root symbol.

**Sillysidley** · 10-25-2006

Is x=1??????

Thanks for the help

**Sillysidley** · 10-25-2006

Whoops, didn't read the question.

Is the answer to the problem 7?

Mr. Hui · 10-25-2006

No, if you plug in x = 7, you won't get the two sides equal. I will provide you with a complete solution.

Mr. Hui · 10-26-2006

As promised, here is the completely worked out solution.

Click to enlarge

10-26-2006

wtf dont show that again

10-30-2006

show what??

10-31-2006

uhhh he shown the answer and how he got it and it was like 5 feet long lol

10-22-2006	#1
Sillysidley Join Date: Oct 2006 Posts: 822	I'm stuck Find 2x+5 if x satisfies sqrt(40-9x)-2sqrt(7-x)=sqrt(-x) I'm stuck HElP!!!

10-22-2006	#2
Mr. Hui Join Date: Mar 2005 Posts: 10,609	First, square both sides to remove complex (imaginary) numbers. Then, solve equation for x. It involves manipulating radicals. __________________ Do Math and you can do Anything! Last edited by Mr. Hui; 10-22-2006 at 01:48 PM..

10-22-2006	#3
Mr. Hui Join Date: Mar 2005 Posts: 10,609	Radicals are expression involving the square root symbol. __________________ Do Math and you can do Anything!

10-25-2006	#4
Sillysidley Join Date: Oct 2006 Posts: 822	I don't know about this... Is x=1?????? Thanks for the help

10-25-2006	#5
Sillysidley Join Date: Oct 2006 Posts: 822	sorry/is the answer to the problem 7 Whoops, didn't read the question. Is the answer to the problem 7?

Common Core Math Alignment

10-26-2006	#7
Mr. Hui Join Date: Mar 2005 Posts: 10,609	As promised, here is the completely worked out solution. Click to enlarge Attached Thumbnails __________________ Do Math and you can do Anything!

10-26-2006	#8
Alex a.k.a whiteboy Guest Posts: n/a	wtf wtf dont show that again

10-31-2006	#10
Alex a.k.a whiteboy Guest Posts: n/a	uhh uhhh he shown the answer and how he got it and it was like 5 feet long lol

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