Question

Calcule o lim(x²-4x+3) com x=3.

Answer 1

Limite simples 

$\lim_{x \to 3}( x^2-4x+3)\\ \\ \lim_{x \to 3}( 3^2-4\times3+3)\\ \\ \lim_{x \to 3}( 9-12+3)\\ \\\boxed{\therefore\lim_{x \to 3}( x^2-4x+3)=0}$