anonymous
  • anonymous
√5(2√45-√5)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
this one is unambiguous = √5(2*3√5 - √5) = 30 - 5 = 25
anonymous
  • anonymous
note √45 = √9 * √5 = 3√5
anonymous
  • anonymous
So which one is the answer?

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anonymous
  • anonymous
|dw:1327093720682:dw|
anonymous
  • anonymous
Can someone answer that one?
anonymous
  • anonymous
the answer is 25 in my last post i was explaining how i simplified √45
anonymous
  • anonymous
Ok so I just put 25 for that answer?
anonymous
  • anonymous
yes as you have a radical expression in bottom of fraction (1 - √3) you rationalise it by multiplying top and bottom by 1 + √3 = 7 (1 + √3) 7 (1 + √3) ------------- = ------ (1 + √3)(1 - √3) -2
anonymous
  • anonymous
Your answer doesn't match any of the choices can I draw them out for you so you can tell me which one is right?
anonymous
  • anonymous
ok
anonymous
  • anonymous
|dw:1327094159731:dw|
anonymous
  • anonymous
Alright those are a and b choices.
anonymous
  • anonymous
|dw:1327094232331:dw|
anonymous
  • anonymous
And those choices are c and d/
anonymous
  • anonymous
hhmm - can i see the original question plz
anonymous
  • anonymous
Yeah I'll post it for youu.
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
That's the question right there.
anonymous
  • anonymous
sorry christian i must leave now to pick up a family member
anonymous
  • anonymous
Alright thanks for all your helpp!

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