\(\sqrt[3]{5+x}-x=5\)
\(\Leftrightarrow\sqrt[3]{5+x}=5+x\)
\(\Leftrightarrow5+x=125+75x+15x^2+x^3\)
\(\Leftrightarrow125+75x+15x^2+x^3-5-x=0\)
\(\Leftrightarrow120+74x+15x^2+x^3=0\)
\(\Leftrightarrow\left(x+4\right)\left(x+5\right)\left(x+6\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-4\\x=-5\\x=-6\end{matrix}\right.\)
Giaỉ PT
1, \(\sqrt{x+2}-2x=3\)
2, \(\sqrt{4-x^2}=2x-4\)
Giaỉ PT:
\(2x-x^2+\sqrt{6x^2-12x+7}=0\)
Giải pt
\(5\sqrt[3]{x+1}+1\sqrt{x+2}+5\sqrt[3]{x+3}=0\)
giải pt \(\sqrt{x+2-3\sqrt{2x-5}}+\sqrt{x-2+\sqrt{2x-5}}=2\sqrt{2}\)
I : Giải PT
\(\sqrt{x+2+3\sqrt{2x-5}}+\sqrt{x-2-\sqrt{x-5}}=2\sqrt{2}\)
help me !!!
giải pt :\(\sqrt{x+3-4\sqrt{x-1}}+\sqrt{x+8+6\sqrt{x-1}}=5\)
giải pt \(3\sqrt{\dfrac{x-5}{2}}-2\sqrt{\dfrac{x-7}{3}}+1=\sqrt{x}\)
Giải các pt sau:
a) \(\sqrt{\dfrac{x+1}{x+3}}+\sqrt{x+1}=\sqrt{x^2-x+1}+\sqrt{x+3}\)
b) \(\sqrt{x^2+12}+5=3x+\sqrt{x^2+5}\)
giải pt: \(\sqrt{x+2-3\sqrt{2x-5}}+\sqrt{x-2+\sqrt{2x-5}}=2\sqrt{2}\)
Thank you so much!!