Toán Lớp 9: Rút gọn
D= $\sqrt{2+\sqrt{3}}$ + $\sqrt{2-\sqrt{3}}$
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Toán Lớp 9: Rút gọn
D= $\sqrt{2+\sqrt{3}}$ + $\sqrt{2-\sqrt{3}}$
Comments ( 1 )
=>D^2=2+\sqrt{3}+2-\sqrt{3}+2\sqrt{2^2-3}
=>D^2=4+2\sqrt{1}=6
=>D=\sqrt{6}