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ValentinkaMS [17]
3 years ago
8

Please help on this math question

Mathematics
1 answer:
Llana [10]3 years ago
4 0

Answer:

\large\boxed{C.\ \dfrac{-2x^2-x+72}{8x^2}}

Step-by-step explanation:

\dfrac{9}{x^2}-\dfrac{2x+1}{8x}=\dfrac{9\cdot8}{x^2\cdot8}-\dfrac{(2x+1)\cdot x}{8x\cdot x}\qquad\text{use the distributive property}\\\\=\dfrac{72}{8x^2}-\dfrac{2x^2+x}{8x^2}=\dfrac{72-(2x^2+x)}{8x^2}=\dfrac{72-2x^2-x}{8x^2}\\\\=\dfrac{-2x^2-x+72}{8x^2}

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