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Hey , how can I type x^2-16/4x-16 in to the calculator so the 4x-16 will be under the x^2-16? The calculator only puts only 4 under the 16.
 Dec 10, 2013
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The question actually told to simplify it so I actually need help with that.
 Dec 10, 2013
 #2
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MathNoobFIN:

Hey , how can I type x^2-16/4x-16 in to the calculator so the 4x-16 will be under the x^2-16? The calculator only puts only 4 under the 16.



That is what brackets are for, both in writing here and on a calculator!

( x^2-16) / (4x-16)

You have to factorise the top and the bottom seperately first.

The top is a difference of 2 squares .
Hint: a 2- b 2 = (a+b) (a - b)

The bottom you just factorise normally

Then you cancel common factors.
I hope that is enough help, but if it is not ask again.
 Dec 10, 2013

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