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bhruifafn

  • 3 years ago

2x^2+8x=-1

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  1. marktierra
    • 3 years ago
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    factor?

  2. bhruifafn
    • 3 years ago
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    yes, if difficult use quadratic formula

  3. marktierra
    • 3 years ago
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    -2 plus or minus (sqrt 14 / 2)

  4. bhruifafn
    • 3 years ago
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    not an answer on the sheet

  5. marktierra
    • 3 years ago
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    (x+2)(2x-sqrt14)

  6. bhruifafn
    • 3 years ago
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    -4 plus or minus sqrt 14 over 2 -4 plus or minus sqrt 2 over 2 -4 plus or minus sqrt 14 over 4 -8 plus or minus sqrt 14 over 2

  7. neverforgetvivistee
    • 3 years ago
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    ok after a long time of being brain dead (i forgot how to do this) i got your answer. It's -4 plus or minus sqrt 14 over 2

  8. bhruifafn
    • 3 years ago
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    thank ya

  9. neverforgetvivistee
    • 3 years ago
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    Ok, so first let's plug it into the quadratic formula -b plus or minus √b^2-4*a*c --------------------------------- 2*a so we get -8 (+-) √8^2-4*2*1 / 2 * 2 let's use basic order of operations -8 (+-)√56 ----------- 4 Now, remember to simplify your radical as best as you can. -8(+-) 2√14 ------------- 4 but -8, 4 , and 2 all go into 2, so we can simplify all numbers by that (except the radical) so we get -4 (+-) √14 ------------ 2

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