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anonymous

  • one year ago

Solve x2 + 6x + 7 = 0. a) x = −1 and x = −5 b) 3 plus or minus square root of 2 c)-3 plus or minus square root of 2 d)-3 plus or minus square root of 2 all over 2

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  1. anonymous
    • one year ago
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    is that x^2 ?

  2. anonymous
    • one year ago
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    yes

  3. anonymous
    • one year ago
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    use the quadratic formula \[\frac{ -b \pm \sqrt{b ^{2}-4ac} }{ 2a }\] A= 1 B = 6 C= 7

  4. anonymous
    • one year ago
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    err C

  5. anonymous
    • one year ago
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    ya it's -6/2 = -3 and sqrt(8) / 2 = sqrt(2)

  6. anonymous
    • one year ago
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    so -3 plus minus sqrt 2

  7. anonymous
    • one year ago
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    thank you

  8. anonymous
    • one year ago
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    you were right, you just didn't apply the /2

  9. anonymous
    • one year ago
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    Np.

  10. anonymous
    • one year ago
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    how would i do −16t2 + 64t + 4?

  11. anonymous
    • one year ago
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    would it be 2 plus or minus square root of 17 all over 2?

  12. anonymous
    • one year ago
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    sorry just saw this

  13. anonymous
    • one year ago
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    \[2 \pm \frac{ \sqrt{17} }{ 2 }\]

  14. anonymous
    • one year ago
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    since it's 64/32 = 2 it becomes only sqrt(17)/2

  15. anonymous
    • one year ago
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    thank you so much

  16. anonymous
    • one year ago
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    Np

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spraguer (Moderator)
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