Question

Giúp em với mn ơi

Answer 1

c: \(\dfrac{2}{x-1}=\dfrac{2x+2}{\left(x-1\right)\left(x+1\right)}\)

\(\dfrac{2}{x+1}=\dfrac{2x-2}{\left(x+1\right)\left(x-1\right)}\)

\(\dfrac{1}{x^2-1}=\dfrac{1}{\left(x-1\right)\left(x+1\right)}\)