Bổ Sung: Giải phương trình:
\(\sqrt{3x+1}=x-1\)
\(\sqrt{4x^2-20x+25}=1\)
\(\sqrt{\left(2+\sqrt{3}\right)^2}+\sqrt{\left(3-\sqrt{3}\right)^2}=2+\sqrt{3}+3-\sqrt{3}=5\)
ĐKXĐ: \(x\ge\frac{2}{3}\)
Bình phương 2 vế:
\(3x-2=2x-1\)
\(\Leftrightarrow x=1\)
\(\sqrt{4x^2-20x+25}=1\)
\(\Leftrightarrow4x^2-20x+25=1\)
\(\Leftrightarrow4x^2-20x+24=0\Rightarrow\left[{}\begin{matrix}x=2\\x=3\end{matrix}\right.\)