## anonymous 5 years ago How do u do quadratic equations i dont get it?

1. anonymous

for example: -3xsquared+75=0

2. anonymous

That one is one you can probably solve like a regular equation: -3x^2=-75 x^2=-75/-3=25 square root both sides and x=5

3. anonymous

There are other methods for solving more complicated quadratic equations such as factoring and the quadratic formula.

4. anonymous

how do u do that?

5. anonymous

Quadratic equations come in this format: ax^2+bx+c If you want to use the quadratic formula it's x$(-b \pm \sqrt{b^2-4ac})/2a$ If you want to factor you can sometimes divide by a GCF. Often you have to put it in this format: (x+k)(x+m). m & k have to be 2 number such that, when you multiply them together you get c, and when you add them together you get b.

6. anonymous

* x=