Homework Help Forum: Algebra 2 URGENT PLEASE HELP

Posted by Anonymous on Saturday, November 7, 2009 at 6:23pm.

Solve. If the equation has no real solution, say so. Square root 3x+4 =x

• Algebra 2 URGENT PLEASE HELP - Reiny, Saturday, November 7, 2009 at 7:11pm

  Is it √(3x+4) or √(3x) + 4 ? If first version √(3x+4) = x square both sides 3x+4 = x^2 x^2 - 3x - 4 = 0 (x-4)(x+1) = 0 x = 4 or x = -1

  
  

• Algebra 2 URGENT PLEASE HELP - Reiny, Saturday, November 7, 2009 at 7:15pm

  I pressed "post answer" too soon Of course since we squared both sides, extraneous roots could have been introduced, so all answers have to be verified. if x = 4 LS = √(12+4) = √16 = 4 = RS if x = -1 LS = √1 = 1 RS = -1 so x = 4 is the only solution.

  
  

Answer this Question

First Name:
School Subject:
Answer:

For Further Reading