Question 25 - Upper Level: Mathematics Achievement Practice Test for the ISEE

If \(f(x)=x^2-2x\) and \(g(x) = 3x+7\), what is \(f(g(x))\)?

\[9x^2+42x+49\]
\[9x+21\]
\[3x^2 -21x\]
\[9x^2+36x+35\]

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