## anonymous one year ago Which of the following is a solution of 4x2 = - 9x - 4?

1. pooja195

Do the directions specify what we have to solve by? Quadratic formula or Factoring?

2. pooja195

Step one: We need to get the equation into $\huge~\rm~ax^2+bx+c=0$ form. What do we do to get the equation into this form?

3. anonymous

4. anonymous

would i minus the 4x^2 on both sides?

5. pooja195

yes! :)

6. anonymous

ok now what ?

7. pooja195

$\huge~\rm-4x^2- 9x - 4=0$

8. pooja195

list your A B C values now :)

9. anonymous

a.9 plus or minus the square root of 17 divided by 8. b.negative 9 plus or minus the square root of 145 divided by 8. c.9 plus or minus the square root of 145 divided by 8. d.negative 9 plus or minus the square root of 17 divided by 8

10. pooja195

abc values...

11. anonymous

i dont understand:/

12. pooja195

ax^2+bx+c=0 -4x^2-9x-4=0 name the abc values now

13. anonymous

a=-4 b=-9 c=-4? like that

14. pooja195

Yes :) $\huge~\rm~~x=\frac{ -(-9)~\pm \sqrt{(-9)^2-4(-4)(-4)} }{ 2(-4) }$

15. pooja195

Solve $\huge~\rm~~x=\frac{ 9~\pm \sqrt{(-9)^2-4(-4)(-4)} }{ 2(-4) }$

16. anonymous

\[\frac{ 81-64? }/-8

17. anonymous

is this right?

18. pooja195

Not quite look at this: http://prntscr.com/7mvafb

19. anonymous

that makes a lot more since lol thank you so much. i got tones more but ill use your method lol

20. pooja195

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