Question

Giúp mình với ạ!

Answer 1

đk : x khác -1 ; 3 

\(\Rightarrow x^2-9+\left(x+1\right)\left(x-2\right)=2\left(x+1\right)\left(x-3\right)\)

\(\Leftrightarrow x^2-9+x^2-x-2=2x^2-4x-6\Leftrightarrow-x-11=-4x-6\)

\(\Leftrightarrow3x=5\Leftrightarrow x=\dfrac{5}{3}\left(tm\right)\)

đk : x khác 1 ; 3 

\(\Rightarrow\left(3x-1\right)\left(x-3\right)-\left(2x+5\right)\left(x-1\right)=\left(x-1\right)\left(x-3\right)\)

\(\Leftrightarrow\left(3x^2-10x+3\right)-\left(2x^2+3x-5\right)=x^2-4x+3\)

\(\Leftrightarrow-13x+8=-4x+3\Leftrightarrow-9x=-5\Leftrightarrow x=\dfrac{5}{9}\left(tm\right)\)