Friday
April 25, 2014

Homework Help: algebra

Posted by Lydia on Saturday, March 10, 2007 at 3:47pm.

Can someone please help me with this one?

Solve (5x+4)^1/2-3x=0

Just so you know, it is to the 1/2 power.

Add 3x to both sides of the equation, then square both sides.

That should enable you to gather terms and factor.

Yeah, that's the part I understood. Could you help me with the factoring?

This is what I have as of now:
(5x+4)^1/2-3x=0
5x+4=3x^2





3x^2-5x-4=0
Go to the quadratic equation

x= -b +- sqrt (b^2=4ac) /2a

x= 5 +- sqrt (25+48) /6

x= 5 +- sqrt (73) /6

x= -0.590667291 ; x= 2.25733396

check my work.


Oh, really? We didn't learn about doing it like that, but I think it does work. Thanks!

wait, I got the same answers as you, but then I checked my work and neither worked

dang: error
(5x+4)^1/2-3x=0
5x+4=Mb>9x^2

typo
(5x+4)^1/2-3x=0
5x+4= 9x^2

That changes the quadratic to

9x^2 -5x -4=0

x= ( 5 +- sqrt (25 + 36*4))/18

check that.

yes it works! thanks a ton!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

algebra - how do I do this Solve for x. 3x 2y = 6 Add 2y to both sides and ...
algebra - Solve for x. (l is the absoulte bar, not one) 3*l 3x-2 l -6 > l 3x-...
science - rearrange this equation 2 make x the subect. 6y = 9 - 3x so first i ...
algebra - I need a step by step explanation on how to add these two equations 2x...
algebra1 - How do i solve this problem? 2(x-3)-3(x+5)=3(x-2)-7 what are the ...
math correction - solve for x: 3x - 2y = 6 i need help in solving this: the ...
Pre Cal - 6-x=2x+9 If you are to solve the equation for x, first try to get the ...
math - just an algebra question. how would you solve: (3x^2 +5)(3x^2 +5) ^ means...
Variable - SOLVING EQUATIONS WITH THE VARIABLE ON BOTH SIDES Solve the equation...
math,correction - can someone correct these for me i'll appreciate it thank. ...

Search
Members