Changes

:<math>f\left ({{4+12}\over{2}}\right ) = f(8) = \frac{3(8)+11}{8^2-8-6} = {35\over50} = {7\over10} </math>

:<math>f\left ({{4+12}\over{2}}\right ) = f(8) = \frac{3(8)+11}{8^2-8-6} = {35\over50} = {7\over10} </math>

<br />Now we can solve:

<br />Now we can solve:

:<math>\left ({12-4 \over 6}\right ) \left ( {23 \over 6} + 4 \left( {7\over10} \right)+ {47 \over 126} \right ) = \left ( {4\over3} \right ) ({2207\over315}) \approx 9.34179... </math>

:<math>\left ({12-4 \over 6}\right ) \left ( {23 \over 6} + 4 \left( {7\over10} \right)+ {47 \over 126} \right ) = \left ( {4\over3} \right ) \left({2207\over315}\right) \approx 9.34179... </math>

<br />As the function given does not resemble a parabola, the answer we get is completely off of the real answer, which is:

<br />As the function given does not resemble a parabola, the answer we get is completely off of the real answer, which is:

: <math>\approx 7.94160...</math>

: <math>\approx 7.94160...</math>