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Math·Advanced Math·Equivalent expressions

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$$\begin{gathered} f(x)=(2x-3)(x+8) \\ g(x)=3(6x-9) \end{gathered}$$

The functions $f$ and $g$ are defined by the equations shown. Which of the following is equivalent to $f(x)-g(x)$?

A

$2x^2+7x-15$

B

$2x^2-5x+3$

C

$2x^2-x-3$

D

$2x^2+31x-51$