## anonymous 4 years ago Solve the equation in quadratic formula! 2x^2-9x-2=0

1. anonymous

i got 9$9\pm \sqrt{65}/4$

2. anonymous

Then $x = \frac{ -b \pm \sqrt{b ^{2} - 4ac } }{2a}$ Where a = 2 b = -9 c = 2

3. anonymous

i know how to do that i just got confused at the end

4. anonymous

$x = \frac{ 9\pm \sqrt{97}}{4}$

5. anonymous

c = -2 .. sorry my mistake..!

6. anonymous

yeah it should be $\sqrt{65}$ not$\sqrt{97}$

7. anonymous

its $\sqrt{97}$ since b^2 - 4ac = (-9^2) - (4x 2 x -2) = 81 - (-16) = 97

8. anonymous

ur right i subtracted instead of add. thank you

9. anonymous

Ur Welcome..!! (:

10. anonymous

So you got the answer?

11. anonymous

yes