Question

giúp mình với ạ

 

Answer 1

a: ĐKXĐ: \(\left(x-3\right)\left(x-2\right)\ne0\)

=>\(x\notin\left\{3;2\right\}\)

b: \(A=\dfrac{x^2-4}{\left(x-3\right)\left(x-2\right)}\)

\(=\dfrac{\left(x-2\right)\left(x+2\right)}{\left(x-3\right)\left(x-2\right)}\)

\(=\dfrac{x+2}{x-3}\)