## anonymous 3 years ago Solve. 3x2 – 7x – 2 = 0

1. jhonyy9

do you know how you can solving a quadratic ?

2. jhonyy9

us formula of discriminant

3. jhonyy9

D = b^2 -4ac

4. jhonyy9

so you dont know it how ?

5. anonymous

no

6. anonymous

$3x^{2}-7x-2=0$ Use the formula that jhonyy9 gave to calculate the Discriminant $D=b^{2}-4ac$ now use the quadratic formula which is $\frac{ -b \pm \sqrt{D} }{ 2a }$ where a=3 b=-7 and c=-2

7. anonymous

uhm ?

8. anonymous

we use these formula's to solve the quadratic equations - $ax^{2}+bx+c=0$

9. anonymous

I have no idea how to do it

10. anonymous

$x=\frac{-b \pm \sqrt{D} }{ 2a }$

11. anonymous

just put the values. first to calculate D and then in the above formula.

12. anonymous
13. anonymous

is the answer $x=\frac{ 7\pm \sqrt{73} }{ 6 }$

14. anonymous

yes :-) ..!!

15. anonymous

yayy