A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
√(x+4)+√(2x+6)=7
anonymous
 5 years ago
√(x+4)+√(2x+6)=7

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0rsmith almost gets the question right. (a+b)^2 = a^2 + 2ab + b^2,

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0this is how I'd approach it: \[ \sqrt{x+4} = 7  \sqrt{2x+6} \] \[ x+ 4 = 49 + (2x+6)14 \sqrt{2x+6} \] \[ x + 4 49 2x6=14\sqrt{2x+6} \] \[ x 51 = 14\sqrt{2x+6} \] \[ x+51 = 14\sqrt{2x+6} \] I am sure you can continue and solve this equation now.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0@ rsmith, you can validate whether your answer is correct by plugging x=13 into the equation sqrt(13+4) + sqrt(2*13+6) =7 sqrt(17) + sqrt(32) = 7 ?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0dont u got to do the one and the ( and here first then u have to to keep bringing it down

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0till u get ur answer or change keep oppisite

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0@oojih where are you going with your solution?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Just square both sides: 3x+10+ 2 sqrt(......=49) etc etc.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0@ rsmith, you need to square the equation one more time to get rid of the square toot, then it boils down to a quadratic equation whic looks prett nasty from the number.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yes x^2 + 102x + 2601 = 196(2x+6) does look nasty

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[ x+ 51 = 14 \sqrt{2x+6} \] \[ (x+51)^2 = 14^2 (2x+6) \] yes..mr rajah can solve this fun quadratic equation

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0check out http://www.oojih.com/displaypage/algebra/ for more algebra study guide and practice test.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you are right oojih. :) roots are 285 and 5. 285 is not sensible so the root being 5 works

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sqrt(5+4) + sqrt(2*5+6) =7 sqrt(9) + sqrt(16) = 3 + 4 = 7... yaayy, good job rsmith

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I command you for solving the quadratic equation..:) This is a good math question, but the number should be made simpler so that students get the concept instead of being bogged down by this ugly number.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.