Question

срочноооооо помогите

Answer 1

$frac{6-4z}{36-z^{2} }$+$frac{5z}{36- z^{2} }$=$frac{6-4z+5z}{36- z^{2} }$=$frac{6+z}{(6+z)(6-z)}$=$frac{1}{6-z}$
$frac{1}{6+2}$=$frac{1}{8}$