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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

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  1. Muskan
    • 2 years ago
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    Quadratic Formula

  2. Muskan
    • 2 years ago
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    yes

  3. Muskan
    • 2 years ago
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    |dw:1354817111266:dw|

  4. Muskan
    • 2 years ago
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    |dw:1354817224827:dw|

  5. Muskan
    • 2 years ago
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    |dw:1354817354330:dw|

  6. Muskan
    • 2 years ago
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    is that your answer

  7. Frostbite
    • 2 years ago
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    that is your answer.

  8. Frostbite
    • 2 years ago
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    \[x=2(\sqrt{3}-2)\] \[x=-2(\sqrt{3}+2)\]

  9. abbie1
    • 2 years ago
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    Wait but can't you also do it by completing the square??

  10. abbie1
    • 2 years ago
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    im so confused. are you suposed to get the same answer no w=matter what method you use???

  11. Frostbite
    • 2 years ago
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    Yes you are :)

  12. Frostbite
    • 2 years ago
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    Unless we use aproximation methods.

  13. abbie1
    • 2 years ago
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    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
    • 2 years ago
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    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
    • 2 years ago
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    thanks!

  16. Frostbite
    • 2 years ago
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    like -4+- root 12 is the same as: \[\pm 2 \sqrt{3}-4\] (sorry I constrantly right wrong)

  17. abbie1
    • 2 years ago
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    Yes..but couldn't the -4 go in front?? thats not the same as your answer.. which is right??!??!?!!!!

  18. Frostbite
    • 2 years ago
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    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
    • 2 years ago
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    thanks!!

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