Could someone please help me with the quadratic formula for 4x2 = - 9x - 4? I'm not sure of my process in the end.

Question

mathstudent55 · Answer

First, we need the quadratic formula.

$x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a} $

mathstudent55 · Answer

Now we need to change your equation into the correct form to use it in the quadratic formula.

mathstudent55 · Answer

$4x^2 = -9x - 4$

We need everything on the left side, so we add to both sides 9x and 4.

$4x^2 + 9x + 4 = 0$

Do you follow this so far?

anonymous · Answer

Yes, I do. Thanks! but I know that later on in the problem there has to be a negative 2 (because of the options given) and I'm not sure where that came from...