Question

Tìm x không âm ,biết:

a) \(\sqrt{x}\)=3

b)\(\sqrt{x}\)=\(\sqrt{5}\)

c) \(\sqrt{x}\)=0

d)\(\sqrt{x}\)=-2

Answer 1

\(\sqrt{x}=3\Rightarrow x=9\)

\(\sqrt{x}=\sqrt{5}\Rightarrow x=5\)

\(\sqrt{x}=0\Rightarrow x=0\)

\(\sqrt{x}=-2\Rightarrow x=\varnothing\)

Answer 2

a)\(\sqrt{x}=3\Rightarrow x=9\)

b)\(\sqrt{x}=\sqrt{5}\Rightarrow x=5\)

c)\(\sqrt{x}=0\Rightarrow x=0\)

d)\(\sqrt{x}=-2\Rightarrow x=4\)