Find all real solutions to x

**GaloisTheory1** · January 26th 2009, 07:14 PM

Originally Posted by tmac11522

what have you done so far?

**tmac11522** · January 26th 2009, 07:22 PM

i multiplied both sides of the equation by (2x+5)(x+4), simplified and got it down to 0=3x^2+10x+35 and i'm stuck

**GaloisTheory1** · January 26th 2009, 07:35 PM

Originally Posted by tmac11522

i multiplied both sides of the equation by (2x+5)(x+4), simplified and got it down to 0=3x^2+10x+35 and i'm stuck

now use quadratic formula....

**topher0805** · January 26th 2009, 07:38 PM

Originally Posted by tmac11522

i multiplied both sides of the equation by (2x+5)(x+4), simplified and got it down to 0=3x^2+10x+35 and i'm stuck

Recall that a quadratic of the form:

$ax^2 + bx + c = 0$

Can be solved by using this equation:

$<br /> x = \frac{-b \pm \sqrt {b^2 - 4ac}}{2a}$

Thread: Find all real solutions to x