## abbie1 2 years ago Solve the following quadratic equation by using a method below: 0 = x^2 + 8x + 4 Methods: Completing the Square Factoring Quadratic Formula Graphing

1. Muskan

2. Muskan

yes

3. Muskan

|dw:1354817111266:dw|

4. Muskan

|dw:1354817224827:dw|

5. Muskan

|dw:1354817354330:dw|

6. Muskan

7. Frostbite

8. Frostbite

$x=2(\sqrt{3}-2)$ $x=-2(\sqrt{3}+2)$

9. abbie1

Wait but can't you also do it by completing the square??

10. abbie1

im so confused. are you suposed to get the same answer no w=matter what method you use???

11. Frostbite

Yes you are :)

12. Frostbite

Unless we use aproximation methods.

13. abbie1

Well is you answer right? x=2(3√−2) x=−2(3√+2) I completed the square and got -4+- root 12?? How would you simplify that???

14. Frostbite

What I wrote is the quadratic formula you had hardships rewriting... mearly a rewriteing, nothing else... This "Completing the square"-method I'm not familiar with... unless we have another name for it in my native language.

15. abbie1

thanks!

16. Frostbite

like -4+- root 12 is the same as: $\pm 2 \sqrt{3}-4$ (sorry I constrantly right wrong)

17. abbie1

Yes..but couldn't the -4 go in front?? thats not the same as your answer.. which is right??!??!?!!!!

18. Frostbite

The answers is the same abbie no need to worry. $2(\sqrt{3}-2)=2\sqrt{3}-4$ Just 2 multiplied into the parentheses.

19. abbie1

thanks!!