anonymous
  • anonymous
I need help solving this problem. √-225 + √-49
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
15i +7i=22i
anonymous
  • anonymous
\[\sqrt{-225} = \sqrt{-1} * \sqrt{225}\] = 25i Look at it that way
anonymous
  • anonymous
as roots can't be defined for negative numbers, they are "imaginary" and the imaginary number is "-i"

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anonymous
  • anonymous
*15i
anonymous
  • anonymous
yeah
radar
  • radar
dont forget to ads the 7i you got from sq root of -49! to get the total of 22i
anonymous
  • anonymous
lol...the answer is 15i+7i
anonymous
  • anonymous
Or \[\sqrt{-484}\]
radar
  • radar
Krb686. Please show how \[\sqrt{-225}+\sqrt{-49}=\sqrt{-484}\]??? Enquiring minds want to know!
anonymous
  • anonymous
Because 15i + 7i = 22i \[i = \sqrt{-1}\] \[22*\sqrt{-1}\] \[\sqrt{22^{2}*-1}\]
radar
  • radar
Thanks, enquiring mind now happy lol.
anonymous
  • anonymous
:D

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