anonymous
  • anonymous
please REALLY help question is on attachment!!!!
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
RATINONLIZE THE DENOMINTOR
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anonymous
  • anonymous
if we simplify the bottom we get \[\sqrt{7}-2\]
anonymous
  • anonymous
did you already combine like terms in the denominator?

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anonymous
  • anonymous
we have to multiply by its conjugate \[\sqrt{7}+2\] to get rid of the radical on the bottom, to make the equation stay equal we multiply by the conjugate/conjugate which equals 1, anything times 1 is itsself so it doesnt change the equation
anonymous
  • anonymous
the top (5) times the conjugate is \[5\sqrt{7} + 10\]
anonymous
  • anonymous
on the bottom it is \[3\]
anonymous
  • anonymous
so we have |dw:1327711885632:dw|

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