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V125BC [204]
3 years ago
14

What is the difference of the rational expressions below

Mathematics
2 answers:
Rzqust [24]3 years ago
7 0

The correct anser is A.

Burka [1]3 years ago
6 0

\bf \cfrac{9}{x^2}-\cfrac{2x+1}{8x}\implies \stackrel{\textit{our LCD will be }8x^2}{\cfrac{(8)9~~-~~(x)(2x+1)}{8x^2}}\implies \cfrac{72-(2x^2+x)}{8x^2} \\\\\\ \cfrac{72-2x^2-x}{8x^2}\implies \cfrac{-2x^2-x+72}{8x^2}

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