qwertyfreak
(6)Add and simplify if possible:
3 5
______ + _________
x5 x^225
a.) 8
_____________
(x+5)(x5)
b.) 3x+20
______________
(x+5)(x5)
c.) 8x+5
____________
(x+5)(x5)



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lalaly
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did u try to do it ? ..

qwertyfreak
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I tried, I dont know how to solve it.

Chlorophyll
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Can you factor: x^225

qwertyfreak
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(x  5)(x + 5)

Chlorophyll
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Yep :)
So what's common denominator?

qwertyfreak
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x5, right?

Chlorophyll
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I mean what should you multiply with the first fraction to get (x  5)(x + 5)

qwertyfreak
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I have no idea

Chlorophyll
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Look at the first denominator, it already had ....

qwertyfreak
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x5. I said that though

Chlorophyll
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what should you MULTIPLY with (x5) > COMMON DENOM (x  5)(x + 5)

qwertyfreak
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3??? Im sorry I have no idea how to do this ):

Chlorophyll
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=> MULTIPLY both upper and lower of the first fraction with (x + 5), will you!

Luis_Rivera
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\[\frac{3}{x5}+\frac{5}{x^225}\\\\=\frac{3(x+5)}{(x5)(x+5)}+\frac{5}{(x5)(x+5)}\\\\=\frac{3x+20}{(x5)(x+5)} \]

Chlorophyll
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@qwertyfreak perform multiply in the first fraction of the second row as in @Luis_Rivera post! Learn it for your own benefit in the long run!