anonymous
  • anonymous
If x ^3 = -27, then what is x? tell me if i am wrong i think its 9
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
would it be negative?
jim_thompson5910
  • jim_thompson5910
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
anonymous
  • anonymous
oh

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jim_thompson5910
  • jim_thompson5910
note: 9^3 = 9*9*9
jim_thompson5910
  • jim_thompson5910
NOT 9^3 = 9*3
anonymous
  • anonymous
no that 3 is supposed to be the tiny number in the corner
jim_thompson5910
  • jim_thompson5910
yeah \(\LARGE x^3\) right?
anonymous
  • anonymous
yea
jim_thompson5910
  • jim_thompson5910
that means x cubed
jim_thompson5910
  • jim_thompson5910
when you cube a number, you have it multiplied 3 times by itself
jim_thompson5910
  • jim_thompson5910
7^3 = 7*7*7 8^3 = 8*8*8 etc etc
jdoe0001
  • jdoe0001
\(\large x ^{\color{red}{ 3}} = -27\implies \sqrt[{\color{red}{ 3}}]{x ^{\color{red}{ 3}}}=\sqrt[{\color{red}{ 3}}]{-27}\implies x=?\)
anonymous
  • anonymous
i dont no anything about square roots
anonymous
  • anonymous
oh i got the answer never mind @jdoe0001

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