Question

\(\dfrac{2}{\sqrt{x-3}}\)\(=\)\(4\)

Answer 1

=>căn(x-3)=1/2

=>x-3=1/4

hay x=3,25

Answer 2

\(\dfrac{2}{\sqrt{x-3}}=4\)

\(\Rightarrow4\sqrt{x-3}=2\)

\(\Rightarrow\sqrt{16}\sqrt{x-3}=2\)

\(\Rightarrow\sqrt{16x-48}=2\)

\(\Rightarrow16x-48=4\)

\(\Rightarrow x=\dfrac{13}{4}\)