Kagome_gurl8 Group Title Anyone good with Quadratic Formulas? I have a couple of questions for you. x^2+9x-4=0 -4x^2+5x-3=0 one year ago one year ago

1. Hero

You don't have to use quad formula to figure these out. You can complete the square. But if you want to use quadratic formula, here it is: $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

Bacon

3. phi

to use the formula you should match your equation to a x^2 +b x + c=0 can you find a, b and c for the first equation?

4. Kagome_gurl8

Im sorry, i truly don't understand