I'm stuck - XP Math - Forums
Sign Up FREE! | Sign In | Classroom Setup | Common Core Alignment

 XP Math - Forums I'm stuck
 User Name Remember Me? Password
 Register Arcade Members List Mark Forums Read

 Thread Tools Display Modes
 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?
 10-25-2006 #6 Mr. Hui     Join Date: Mar 2005 Posts: 10,609 No, if you plug in x = 7, you won't get the two sides equal. I will provide you with a complete solution. __________________ Do Math and you can do Anything!
 10-25-2006 #7 Sillysidley   Join Date: Oct 2006 Posts: 822 I made a mistake it should be something like 40-9x+7+x+2sqrt... __________________ .
 10-26-2006 #8 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 #9 Alex a.k.a whiteboy Guest   Posts: n/a wtf wtf dont show that again
 10-30-2006 #10 puppydog Guest   Posts: n/a show what??

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Welcome     XP Math News     Off-Topic Discussion Mathematics     XP Math Games Worksheets     Homework Help     Problems Library     Math Challenges

All times are GMT -4. The time now is 06:22 PM.

 Contact Us - XP Math - Forums - Archive - Privacy Statement - Top

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XP Math