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OpenStudy (anonymous):
PLease Help Easy Question!!!
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OpenStudy (anonymous):
\[\frac{ 21 }{ (12-x) }-\frac{ 21 }{ 12+x }\] How o solve these?
OpenStudy (anonymous):
Find a common denominator.
hartnn (hartnn):
\[\large\frac{a}{b}+\frac{c}{d}=\frac{ad+bc}{bd}\]
OpenStudy (angela210793):
find the common denom and this is what it will be also (a-b)*(a+b)=(a^2-b^2) |dw:1356524168863:dw|
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