Câu 2.26 :
a. $\left ( \sqrt{3} \right )^{2}$ = $\sqrt{3}$
b. $\left ( \sqrt{21} \right )^{2}$ = $\sqrt{21}$
Câu 2.26 : Tính
a. $\left ( \sqrt{3} \right )^{2}$
b. $\left ( \sqrt{21} \right )^{2}$
Câu 2.26 :
a. $\left ( \sqrt{3} \right )^{2}$ = $\sqrt{3}$
b. $\left ( \sqrt{21} \right )^{2}$ = $\sqrt{21}$