Saturday

August 30, 2014

August 30, 2014

Posted by **Daleda** on Wednesday, January 18, 2012 at 11:30pm.

1).2x^2+9x+4=0

2).5x^2=-7x

- Algebra -
**kk-gothgirl-kk**, Wednesday, January 18, 2012 at 11:32pmwrite them so all the x variables are on one side

0 = -2x^2 + 9x - 4 and 0 = 6x^2 - x - 2

if you can, factor out any common factors (in this case, you can not for either equation)

You could use the quadratic formula or just a little trial and error to factor the equations.

The first one is easy to factor using trial and error

What factors of -2 and -4 would multiply then add up to 9? Factors for -2 are -2, 1, -1, 2 and factors for -4 are -4, 1, -2, 2, -1, 4

Plug any of those combinations in the formula x 0 = (?x+?)(?x+?)

In this case, 0 = (-2x+1)(x-4), then make each paretheses equal to 0 and solve for x (solution: x = 1/2 or 4)

Both equations would probably be more easily solved using the quadratic formula xoxo gothgirl- kk

- Algebra -
**kk-gothgirl-kk**, Wednesday, January 18, 2012 at 11:33pmhope that helps :D

**Related Questions**

Quadratic Equations - Can anybody tell me step wise step how to solve this ...

Algebra 2 - I need to know how to solve quadratic equations by factoring. Can ...

algebra 1 - ELEMENTARY ALGEBRA #3 Page 23 Chapter 3 Lesson 3.02 Solving Multi-...

Math - I am really have a tough time trying to solve this problem. I think my ...

Math - Stupid question time. I need to figure out how to rearrange equations to ...

algebra - please give me step by step instructions on how to solve the following...

algebra - please giveme step by step instructions on how to solve linear ...

Algebra - Can you please give an example step by step of how to solve a system ...

algebra 2 - Solve system of equations.Describe each step if your solution. W+X+Y...

Math; Pre- Algebra - I neede help with how to solve equations with variabls on ...