Question

giúp mình nhanh nhanh vớiiii

Answer 1

\(\sqrt{\text{5x - 6}}\) = 3
5x - 6 = 9 
5x = 15 
x =3

Answer 2

\(x=3\)

Answer 3

ĐKXĐ: \(x\ge\dfrac{6}{5}\)

\(\sqrt{5x-6}-3=0\)

\(\Leftrightarrow\sqrt{5x-6}=3\)

\(\Leftrightarrow\left|5x-6\right|=9\)

\(\Rightarrow5x-6=9\)

\(\Leftrightarrow x=3\) (TM)

Answer 4

\(f,\sqrt{5x-6}-3=0\) 

\(\Leftrightarrow\sqrt{5x-6}=3\)

\(\Leftrightarrow5x-6=9\)

\(\Leftrightarrow5x=15\)

\(\Leftrightarrow x=3\)

Vậy: \(S=\left\{3\right\}\)