Anh ko ghi lại đề nha em !
\(\Leftrightarrow\orbr{\begin{cases}x^2+1=0\\3x^2-5x+2=0\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x^2=-1\left(vn\right)\\x_1=1;x_2=\frac{2}{3}\end{cases}}\)( vn là vô nghiệm nha )
Vậy : x = 1 hoặc x = 2/3
\(\left(x^2+1\right).\left(3x^2-5x+2\right)=0\)
\(x^2\ge0\Rightarrow x^2+1\ge1\)
\(\RightarrowĐể\left(x^2+1\right).\left(3x^2-5x+2\right)=0\)
\(\Rightarrow3x^2-5x+2=0\Rightarrow3x^2-3x-2x+2=0\)
\(\Rightarrow3x.\left(x-1\right)-2.\left(x-1\right)=0\Rightarrow\left(3x-2\right).\left(x-1\right)=0\Rightarrow\orbr{\begin{cases}x=1\\x=\frac{2}{3}\end{cases}}\)
