SOLUTION: add. Simplify if possible. 4z/z^2-4+z/z-2

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Question 419737: add. Simplify if possible.
4z/z^2-4+z/z-2
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
4z/z^2-4 + z/z-2
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lcd = z^2-4
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Rewrite each fraction with the lcd as its denominator:
[4z/lcd] + [z(z+2)/lcd]
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Add to get:
[4z+z(z+2)]/lcd
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Combine:
= [z^2+6z]/[z^2-4]
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Cheers,
Stan H.
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