Question

сократите дробь c^2-16/(c-4)^2

Answer 1

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