Simplifying (I'll stop, I promise)  TOPIC_SOLVED

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.

Simplifying (I'll stop, I promise)  TOPIC_SOLVED

Postby EdSewersPark on Wed May 25, 2011 6:09 pm

OK, so where am I going wrong here?

Simplify:

So I converted into

=

=

=



But I'm told the answer is: or so, obviously I cannot do the conversion (why?)



So I did it without the conversion:

Simplify:

=

=

and here's where I'm lost: =
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Re: Simplifying (I'll stop, I promise)

Postby Luke53 on Wed May 25, 2011 7:28 pm

Simplify: ( 2^(1/4) + 8^!1/4))^2
(2^(1/4))^2 = 4^(1/4) = sqrt (2)
16^(1/4) = 2 (twice)
64^(1/4) =sqrt 8 = 2*sqrt (2)
the sum is: sqrt (2) + 2 + 2 + 2 * sqrt(2) = 4 + 3 * sqrt (2).
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Re: Simplifying (I'll stop, I promise)

Postby EdSewersPark on Wed May 25, 2011 8:50 pm

Aha, these are the mistakes I make every time.
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