A. ${\left(x + 3\right)}^3$

B. $3{\left(x + 3\right)}^2$

C. $3{\left(x + 3\right)}^3$

D. ${\left(x + 3\right)}^4$

A.  $\frac{\text{1}}{{\text{x}}^{\text{2}}+\text{xy}}\text{;}\frac{\text{1}}{\text{xy}-{\text{y}}^{\text{2}}}\text{;}\frac{\text{3}}{{\text{y}}^{\text{2}}-{\text{x}}^{\text{2}}}$

B.  $\frac{\text{1}}{{\text{x}}^{\text{2}}-{\text{y}}^{\text{2}}}\text{;}\frac{\text{6x}}{\text{2x}-\text{2y}}$

C.  $\frac{\text{8y}}{{\text{(x}-\text{y)}}^{\text{2}}}\text{;}\frac{\text{7}}{\text{x}+\text{y}}\text{;}\frac{\text{1}}{{\text{y}}^{\text{2}}}$

D.  $\frac{\text{4}}{\text{5(x}-\text{y)}}\text{;}\frac{\text{6}}{\text{3x}+\text{3y}}\text{;}\frac{\text{5}}{{\text{x}}^{\text{2}}-{\text{y}}^{\text{2}}}$

A.  $\frac{\text{1}}{\text{3(x}-\text{1)}}\text{;}\frac{\text{x}}{{\text{(x}-\text{2)}}^{\text{2}}}\text{;}\frac{\text{5}}{\text{4(x}-\text{2)}}$

B.  $\frac{\text{x}}{\text{x}-\text{1}}\text{;}\frac{\text{5}}{\text{6(x}-{\text{2)}}^{\text{3}}}$

C.  $\frac{\text{1}}{{\text{x}}^{\text{2}}-\text{4}}\text{;}\frac{\text{7}}{\text{12(x}-\text{1)}}$

D.  $\frac{\text{1}}{\text{x}-\text{2}}\text{;}\frac{\text{5}}{\text{3(x}-{\text{2)}}^{\text{3}}}\text{;}\frac{\text{x}}{\text{5(x}-\text{1)}}$

A. Bạn Nam đúng, bạn Minh sai.

B. Bạn Nam sai, bạn Minh đúng.

C. Hai bạn đều sai

D. Hai bạn đều đúng.