## anonymous 4 years ago 0=x^2-9x+4

1. anonymous

I can't figure out how to find the two solutions? how can you factor this?

2. anonymous

3. anonymous

use the formula ax^2+bx+c $x=(-b \pm \sqrt{b ^{2}-4ac})/2a$

4. anonymous

oh ok

5. anonymous

b= -9??

6. anonymous

wait i got it

7. anonymous

|dw:1320973352751:dw|

8. anonymous

For example, for the quadratic equation x2 + x - 12 = 0, x = 3 and x = -4 are both roots ... 9x2 = 81 (a = 9, b = 0, c = -81 since we could subtract 81 from both sides) ...

9. anonymous

x=6.21

10. anonymous

yes b = -9

11. anonymous

Quadratic Equations AlgebraIn this case, the equation x2 - x - 2 = 0 can be broken apart into two factors [i.e., ... 9x2 = 81 (a = 9, b = 0, c = -81 since we could subtract 81 from both sides) ...

12. anonymous

yes a=1, b=-9,c=4

13. anonymous

I got 9 +- sqrt 65 / 2

14. anonymous

yes (9+- sqrt65)/2

15. anonymous

16. anonymous

Exactly

17. anonymous

can u helpp me

18. anonymous

or someone

19. anonymous

20. anonymous

can u help meeee plzzz

21. anonymous