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anonymous

  • one year ago

If x ^3 = -27, then what is x? tell me if i am wrong i think its 9

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  1. anonymous
    • one year ago
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    would it be negative?

  2. jim_thompson5910
    • one year ago
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    replace x with 9 and see what happens x^3 = -27 9^3 = -27 729 = -27 .. this equation is false so x = 9 is not the answer

  3. anonymous
    • one year ago
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    oh

  4. jim_thompson5910
    • one year ago
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    note: 9^3 = 9*9*9

  5. jim_thompson5910
    • one year ago
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    NOT 9^3 = 9*3

  6. anonymous
    • one year ago
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    no that 3 is supposed to be the tiny number in the corner

  7. jim_thompson5910
    • one year ago
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    yeah \(\LARGE x^3\) right?

  8. anonymous
    • one year ago
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    yea

  9. jim_thompson5910
    • one year ago
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    that means x cubed

  10. jim_thompson5910
    • one year ago
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    when you cube a number, you have it multiplied 3 times by itself

  11. jim_thompson5910
    • one year ago
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    7^3 = 7*7*7 8^3 = 8*8*8 etc etc

  12. jdoe0001
    • one year ago
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    \(\large x ^{\color{red}{ 3}} = -27\implies \sqrt[{\color{red}{ 3}}]{x ^{\color{red}{ 3}}}=\sqrt[{\color{red}{ 3}}]{-27}\implies x=?\)

  13. anonymous
    • one year ago
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    i dont no anything about square roots

  14. anonymous
    • one year ago
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    oh i got the answer never mind @jdoe0001

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