## anonymous 4 years ago help w/ quadratic equation: -0.01x^2+50x-62100=0

1. anonymous
2. anonymous

since there is a +or- you will get 2 answers for x

3. anonymous

i know but i need help solving it

4. anonymous

-0.01x^2+50x-62100=0 x^2-5000x+6210000=0 $x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}$

5. anonymous

Zed can help you with that, but it's literally just plugging in the values for a b c into the equation

6. anonymous

Here a=1, b=-5000 and c=6210000 $x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}$$=\frac{5000 \pm \sqrt{(-5000)^2-4*1*6210000}}{2*1}$$=\frac{5000 \pm \sqrt{25000000-24840000}}{2}$$=\frac{5000 \pm \sqrt{160000}}{2}$$=\frac{5000 \pm 400}{2}$$=2500 \pm 200$ So x=2700 or x=2300