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anonymous

  • one year ago

Solve open parentheses square root of 6 close parentheses to the 8 x power = 216x−3.

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  1. anonymous
    • one year ago
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    |dw:1438190220162:dw|

  2. anonymous
    • one year ago
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    I'm really confused

  3. anonymous
    • one year ago
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    Oh! Okay I got -9 :)

  4. anonymous
    • one year ago
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    @phi

  5. phi
    • one year ago
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    by first thought is 216 is probably a power of 6. is it ?

  6. anonymous
    • one year ago
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    yes:) 6^3

  7. phi
    • one year ago
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    and sqr(6) is 6^(1/2)

  8. anonymous
    • one year ago
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    yes

  9. welshfella
    • one year ago
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    (sqrt6)^8x = (6^!/2)^8x = 6^4x 216^(x - 3) = (6^3)^ (x - 3) = 6^ 3(x - 3)

  10. anonymous
    • one year ago
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    so maybe 4x=3x-9 ??

  11. welshfella
    • one year ago
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    6^4x = 6^(3(x-3) so 4x = 3(x - 3)

  12. phi
    • one year ago
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    yes, it looks like -9

  13. phi
    • one year ago
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    not maybe. definitely 4x= 3x-9

  14. anonymous
    • one year ago
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    yay :)

  15. welshfella
    • one year ago
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    yes x = -9

  16. anonymous
    • one year ago
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    Can I ask one more?

  17. welshfella
    • one year ago
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    ok

  18. anonymous
    • one year ago
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    Solve 81^x = 27^x + 2.

  19. anonymous
    • one year ago
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    |dw:1438190777607:dw|

  20. anonymous
    • one year ago
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    I have no idea about this one

  21. welshfella
    • one year ago
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    change them to powers of 3

  22. welshfella
    • one year ago
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    81 = 3^4 and 27 = 3^3

  23. anonymous
    • one year ago
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    so 3^4=81

  24. anonymous
    • one year ago
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    3^3=27

  25. anonymous
    • one year ago
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    yes.

  26. welshfella
    • one year ago
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    yea and 27^(x + 2) = 3^(3(x+2)

  27. anonymous
    • one year ago
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    x=6!

  28. anonymous
    • one year ago
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    Was I right?

  29. welshfella
    • one year ago
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    4x = 3x + 6 x = 6

  30. welshfella
    • one year ago
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    yea

  31. anonymous
    • one year ago
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    Wanna do one last one?

  32. welshfella
    • one year ago
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    sorry just been called away

  33. anonymous
    • one year ago
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    kk! Thanks anyways!

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