Question

efetue as divisões seguintes fatorando o dividendo

Answer 1

$a) \\ \frac{x ^{2} - 14x + 49 }{x - 7} = \\ = \frac{(x - 7)^{2}}{(x - 7)} = \\ \frac{(x - 7).(x - 7)}{(x - 7)} = \\ \frac{(x - 7)}{(x - 7)} .(x - 7) = \\ 1.(x - 7) = \\ = x - 7$
$b) \\ \frac{x^{2} - 16}{x + 4} = \frac{(x - 4).(x + 4)}{(x + 4)} = \\ (x - 4). \frac{(x + 4)}{(x + 4)} = \\ (x - 4).1 = \\ = x - 4$