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A \(\begin{array}{l}
a)\,\,5x\left( {3x + 2y} \right)\\
b)\,\,\left( {5x + 2y} \right)\left( {y - 8} \right)\\
c)\,\,\left( {6xy - 1} \right)\left( {x - 2} \right)\\
d)\,\,\,\left( {{x^2} + 1} \right)\left( {x - 1} \right)
\end{array}\)

B \(\begin{array}{l}
a)\,\,5x\left( {3x + 2y} \right)\\
b)\,\,7\left( {5x + 2y} \right)\left( {y - 8} \right)\\
c)\,\,\left( {6xy - 1} \right)\left( {x - 2} \right)\\
d)\,\,\,\left( {{x^2} + 1} \right)\left( {x + 1} \right)
\end{array}\)

C \(\begin{array}{l}
a)\,\,5x\left( {3x + 2y} \right)\\
b)\,\,7\left( {5x + 2y} \right)\left( {y - 8} \right)\\
c)\,\,\left( {6xy - 1} \right)\left( {x - 2} \right)\\
d)\,\,\,\left( {{x^2} + 1} \right)\left( {x - 1} \right)
\end{array}\)

D \(\begin{array}{l}
a)\,\,5x\left( {3x - 2y} \right)\\
b)\,\,7\left( {5x + 2y} \right)\left( {y - 8} \right)\\
c)\,\,\left( {6xy - 1} \right)\left( {x - 2} \right)\\
d)\,\,\,\left( {{x^2} + 1} \right)\left( {x - 1} \right)
\end{array}\)

A \(\begin{array}{l}
a)\,\,\,x \in \left\{ {1;\,\,2} \right\}\\
b)\,\,x \in \left\{ { - \frac{2}{7};\,\,\,0} \right\}\\
c)\,\,x \in \left\{ {0;\,\,\frac{5}{7};\,\,7} \right\}\\
d)\,\,x \in \left\{ { - 1;\,\,1;\,\,3} \right\}
\end{array}\)

B \(\begin{array}{l}
a)\,\,\,x \in \left\{ {1} \right\}\\
b)\,\,x \in \left\{ { - \frac{2}{7}} \right\}\\
c)\,\,x \in \left\{ {0;\,\,\frac{5}{7};\,\,7} \right\}\\
d)\,\,x \in \left\{ { - 1;\,\,1;\,\,3} \right\}
\end{array}\)

C \(\begin{array}{l}
a)\,\,\,x \in \left\{ {2} \right\}\\
b)\,\,x \in \left\{ { - \frac{2}{7}} \right\}\\
c)\,\,x \in \left\{ {0;\,\,\frac{5}{7};\,\,7} \right\}\\
d)\,\,x \in \left\{ { - 1;\,\,1} \right\}
\end{array}\)

D \(\begin{array}{l}
a)\,\,\,x \in \left\{ {1} \right\}\\
b)\,\,x \in \left\{ { - \frac{2}{7}} \right\}\\
c)\,\,x \in \left\{ {0;\,\,\frac{5}{7};\,\,7} \right\}\\
d)\,\,x \in \left\{ { - 1;\,\,1;\,\,3} \right\}
\end{array}\)