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A \(\begin{array}{l}
a)\,\,\,4{x^4} - 5{x^2}y + 2{x^2}\\
b)\,\,3{x^3} + {x^2}y + 2xy
\end{array}\)

B \(\begin{array}{l}
a)\,\,\,4{x^4} - 5{x^2}y + 2{x^2}\\
b)\,\,{x^3} + {x^2}y + 2xy
\end{array}\)

C \(\begin{array}{l}
a)\,\,\,4{x^4} + 5{x^2}y + 2{x^2}\\
b)\,\,3{x^3} + {x^2}y + 2xy
\end{array}\)

D \(\begin{array}{l}
a)\,\,\,4{x^4} + 5{x^2}y + 2{x^2}\\
b)\,\,{x^3} + {x^2}y + 2xy
\end{array}\)

A \(\begin{array}{l}
a)\,\,\,x =- 3\\
b)\,\,\,x = 5
\end{array}\)

B \(\begin{array}{l}
a)\,\,\,x =- \frac{1}{3}\\
b)\,\,\,x = 5
\end{array}\)

C \(\begin{array}{l}
a)\,\,\,x = 3\\
b)\,\,\,x = 5
\end{array}\)

D \(\begin{array}{l}
a)\,\,\,x = \frac{1}{3}\\
b)\,\,\,x = 5
\end{array}\)

A \(\begin{array}{l}
a)\,\,A = - \frac{4}{5}\\
b)\,\,B =  \frac{{51}}{2}\,
\end{array}\)

B \(\begin{array}{l}
a)\,\,A =  \frac{4}{5}\\
b)\,\,B = - \frac{{51}}{2}\,
\end{array}\)

C \(\begin{array}{l}
a)\,\,A = - \frac{4}{5}\\
b)\,\,B = - \frac{{51}}{2}\,
\end{array}\)

D \(\begin{array}{l}
a)\,\,A = - \frac{4}{5}\\
b)\,\,B = - \frac{{99}}{4}\,
\end{array}\)

A \(\begin{array}{l}
a)\,\,S = 8{x^2} + 2xy + 2x\,\,\,\left( {{m^2}} \right)\\
b)\,\,\,S = 84{m^2}.
\end{array}\)

B \(\begin{array}{l}
a)\,\,S = 8{x^2} + 2xy + 2x\,\,\,\left( {{m^2}} \right)\\
b)\,\,\,S = 74{m^2}.
\end{array}\)

C \(\begin{array}{l}
a)\,\,S = 8{x^2} + 2xy - 2x\,\,\,\left( {{m^2}} \right)\\
b)\,\,\,S = 84{m^2}.
\end{array}\)

D \(\begin{array}{l}
a)\,\,S = 8{x^2} - 2xy + 2x\,\,\,\left( {{m^2}} \right)\\
b)\,\,\,S = 80{m^2}.
\end{array}\)