Thursday

April 2, 2015

April 2, 2015

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

Square root 3x+4 =x

- Algebra 2 URGENT PLEASE HELP -
**Reiny**, Saturday, November 7, 2009 at 7:11pmIs 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 7:15pmI 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**

**Related Questions**

Algebra 2 - solve. If the equation has no real solutions, say so. Square root of...

algebra,math - Solve the equation. Check both solutions and only write the real ...

Algebra - Use the quadratic formula to solve the equation. Give exact answers: ...

Pre Algebra - Please help me with some problems. Thank you! Solve the equation ...

algebra - Help Fast PLEASE!! check for corrections on my problems 1.Rewrte the ...

algebra - 1.)correct 2.)wrong---> the first term is wrong 4(3a^2)^2 = 36a^4 3...

algebra - could someone please check these roblems for me and if they are not ...

algebra - Find the real solutions 8x^2 + y^2 = 25 8X^2 - y^2 = 39 Is this no ...

Algebra - Hello Reiny, please check these problems for me and if they are not ...

Algebra (urgent!) - I am a bit confused about conjugates in algebra. I am ...