anonymous
  • anonymous
Solve the equation. Identify any extraneous solutions. sqrt a = -8 A. –64 is a solution of the original equation. 64 is an extraneous solution. B. 64 is a solution of the original equation. C. 64 is a solution of the original equation. –64 is an extraneous solution. D. no solution <<<
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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tyteen4a03
  • tyteen4a03
To get rid of square roots, square both sides.
precal
  • precal
|dw:1359074224200:dw|do just like tyteen4a03 suggested
anonymous
  • anonymous
a=64?

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anonymous
  • anonymous
so, is it b or c??
anonymous
  • anonymous
i say c. am i right??
tyteen4a03
  • tyteen4a03
@Hally The answer is B. Whenever you are raising a number to an even number, the negative sign disappears. (If you need proof just ask.)
anonymous
  • anonymous
i know that part thanks! :)
precal
  • precal
|dw:1359074648834:dw|
precal
  • precal
|dw:1359074661681:dw|question is, is this true?
anonymous
  • anonymous
no. sqrt 64 = 8 and 8 is not equal to -8
precal
  • precal
|dw:1359074893672:dw|
precal
  • precal
then that means that the solution is extraneous
anonymous
  • anonymous
oh. so the answer is "64 is a solution of the original equation. –64 is an extraneous solution" .... right?

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