\(2x^2=x\)
\(\Rightarrow2x^2-x=0\)
\(x\left(2x-1\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x=0\\2x-1=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=0\\x=\frac{1}{2}\end{cases}}}\)
Vậy \(x=0\)hoặc \(x=\frac{1}{2}\)
\(x^3=x^5\)
\(\Rightarrow x^5-x^3=0\)
\(x^3.\left(x^2-1\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x^3=0\\x^2-1=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=0\\x=1\end{cases}}}\)
Vậy \(x=0\)hoặc \(x=1\)
\(x^2.\left(x+1\right)+2x\left(x+1\right)=0\)
\(\left(x+1\right)\left(x^2+2x\right)=0\)
\(x.\left(x+1\right)\left(x+2\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x=0\\x+1=0\end{cases}}\)hoặc \(x+2=0\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x=-1\end{cases}}\)hoặc \(x=-2\)
Vậy \(\orbr{\begin{cases}x=0\\x=-1\end{cases}}\) hoặc \(x=-2\)
\(x.\left(2x-3\right)-2\left(3-2x\right)=0\)
\(x.\left(2x-3\right)+2.\left(2x-3\right)=0\)
\(\left(2x-3\right)\left(x+2\right)=0\)
\(\Rightarrow\orbr{\begin{cases}2x-3=0\\x+2=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=\frac{3}{2}\\x=-2\end{cases}}}\)
Vậy \(x=\frac{3}{2}\)hoặc \(x=-2\)
\(2x^2-x=0\Leftrightarrow x\left(2x-1\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x=\frac{1}{2}\end{cases}}\)
\(S\left\{0;\frac{1}{2}\right\}\)
\(d)x^3-x^5=0\Leftrightarrow x^3\left(1-x^2\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x^3=0\\1-x^2=0\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x=\pm\sqrt{1}\end{cases}}\)
\(S=\left\{0;\pm\sqrt{1}\right\}\)
các câu sau tương tự nha bn
