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anonymous

  • one year ago

Factor 64x^2+25

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  1. mathmate
    • one year ago
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    This is of the form (a^2+b^2) for which there are no real/rational factors. Check the question carefully to see if there is a typo.

  2. anonymous
    • one year ago
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    (8x+5)(8x-5)

  3. LynFran
    • one year ago
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    is that ur answer? (8x+5)(8x-5) if so thats not correct since when we foil it out we will have 8x*8x+8x*-5+5*8x+5*-5 which gives 64x^2 -40x +40x -25 64x^2-25 ...

  4. anonymous
    • one year ago
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    Yeah I agree with @LynFran (8x+5)(8x−5) =(8x+5)(8x+−5) =(8x)(8x)+(8x)(−5)+(5)(8x)+(5)(−5) =64x^2−40x+40x−25 =64x^2−25

  5. anonymous
    • one year ago
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    Hmmm...so what should I do?

  6. anonymous
    • one year ago
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    Well, I don't think 64x^2+25 can be factored. Don't judge me...thats my perspective :|

  7. anonymous
    • one year ago
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    What if we used the quad formula?

  8. anonymous
    • one year ago
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    Hold on...let me solve it.

  9. anonymous
    • one year ago
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    i got x=-5/8 or x=5/8

  10. anonymous
    • one year ago
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    I got 64x^27 :O

  11. anonymous
    • one year ago
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    Ugh! I don't know what to do haha

  12. anonymous
    • one year ago
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    Are you sure this is the question? :O Even no calculator could solve it!

  13. LynFran
    • one year ago
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    |dw:1439783529269:dw|

  14. anonymous
    • one year ago
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    Yay! So, I was right?

  15. anonymous
    • one year ago
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    Hehe!! :D Great job! :D

  16. anonymous
    • one year ago
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    Thanks <3 for all your help guys :)

  17. LynFran
    • one year ago
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    but it would be imaginary # though...

  18. anonymous
    • one year ago
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    I know, but it's better than writing "no solution" or "can't be factored...."

  19. LynFran
    • one year ago
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    lol

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