Question

сократите дробь c^2-16/(c-4)^2

Answer 1

$frac{c^2-16}{(c-4)^2}=frac{c^2-4^2}{(c-4)^2}=frac{(c-4)*(c+4)}{(c-4)*(c-4)}=frac{c-4}{c+4}$