Ta có: \(\sqrt{x-2}+\sqrt{4x-8}+\sqrt{9x-18}=\sqrt{25x-50}+9\)
\(\Leftrightarrow\sqrt{x-2}+2\sqrt{x-2}+3\sqrt{x-2}-5\sqrt{x-2}=9\)
\(\Leftrightarrow x-2=81\)
hay x=83
Đúng 1
Bình luận (0)
Ta có: √x−2+√4x−8+√9x−18=√25x−50+9x−2+4x−8+9x−18=25x−50+9
⇔√x−2+2√x−2+3√x−2−5√x−2=9⇔x−2+2x−2+3x−2−5x−2=9
⇔x−2=81⇔x−2=81
hay x=83
Đúng 2
Bình luận (0)
