Question

[soyaaa]

Tìm số x không âm, biết:

a) $\surd x=11$√� = 15;         b) $\mathrm{2\surd }x=-13/15$2√� = 14

c) $\surd x=\surd 6$√� < √2;          

Answer 1

[乇尺尺のﾚ]

\(a)\sqrt{x}=11\\ \Rightarrow\sqrt{x}=\sqrt{11^2}\\ \Rightarrow\sqrt{x}=\sqrt{121}\\ \Rightarrow x=121\\ b)2\sqrt{x}=-\dfrac{13}{15}\\ \Rightarrow\sqrt{x}=-\dfrac{13}{15}:2\\ \Rightarrow\sqrt{x}=-\dfrac{13}{30}\left(ktm\right)\\ c)\sqrt{x}=\sqrt{6}\\ \Rightarrow x=6\)