Question

сократить дробь c^2-16/ (c-4)^2

Answer 1

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

Answer 2

$\frac{c+4}{c(c-4)} = \frac{c+4)}{c^{2}-4c}$$\frac{ c^{2}-16 }{(c-4)^{2} } = \frac{ c^{2}- 4^{2} }{(c-4)^{2} } = \frac{(c-4)(c+4)}{ c^{2}-8c+16 } = \frac{(c-4)(c+4)}{c(c-4)(c-4)}$