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anonymous

  • 5 years ago

How do u solve this: Find the roots of the quadratic equation x2 − 8x + 8 = 0 . x1 = x2 =

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  1. anonymous
    • 5 years ago
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    Do you know the quadratic formula?

  2. anonymous
    • 5 years ago
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    a=1 , b= -8 , c=8 usding the equation x1= 4+2sqrt2 x2= 4-2sqrt2

  3. anonymous
    • 5 years ago
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    so we just plug it into the quadratic formula and it gives us those two answers?

  4. anonymous
    • 5 years ago
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    yes. \[ax^2 + bx + c = 0 \implies x = \frac{-b\pm \sqrt{b^2-4ac}}{2a}\]

  5. anonymous
    • 5 years ago
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    yes,

  6. anonymous
    • 5 years ago
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    thanks guys

  7. radar
    • 5 years ago
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    Car2021 your equation can be factored giving you; (x-8)(x-1)

  8. radar
    • 5 years ago
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    Since this product is 0 you know that the factors are zero (at least one or both) x=8 and x=1

  9. anonymous
    • 5 years ago
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    @radar i don't think it can be factrorized, try to spread what you type u will get x^2 -9x+8

  10. radar
    • 5 years ago
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    Hey funky girl you are so right and that does not equal the equation. Please ignore Car2021 and thanks for straightening me out lol

  11. anonymous
    • 5 years ago
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    You are welcome =)

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spraguer (Moderator)
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