## Mandy86 3 years ago Solve the equation in quadratic formula! 2x^2-9x-2=0

1. Mandy86

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

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

3. Mandy86

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

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

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

6. Mandy86

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

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

8. Mandy86

Ur Welcome..!! (: