Question

5+\(\dfrac{96}{x^2-16}\)=\(\dfrac{2x-1}{x+4}\)-\(\dfrac{3x-1}{4-x}\)

Answer 1

\(5+\dfrac{96}{x^2-16}=\dfrac{2x-1}{x+4}-\dfrac{3x-1}{4-x}\left(ĐKXĐ:x\ne\pm4\right)\)

\(\Leftrightarrow5+\dfrac{96}{\left(x-4\right)\left(x+4\right)}=\dfrac{2x-1}{x+4}+\dfrac{3x-1}{x-4}\)

\(\Leftrightarrow\dfrac{5\left(x-4\right)\left(x+4\right)+96}{\left(x-4\right)\left(x+4\right)}=\dfrac{\left(2x-1\right)\left(x-4\right)+\left(3x-1\right)\left(x+4\right)}{\left(x-4\right)\left(x+4\right)}\)

\(\Rightarrow5\left(x-4\right)\left(x+4\right)+96=\left(2x-1\right)\left(x-4\right)+\left(3x-1\right)\left(x+4\right)\)

P/s: tới đây pn tự giải tiếp nha, kết quả \(x=8\) (nhận)