Question

simplifique
X²-8x+15
------------
2X²-4x-6

Answer 1

Por produto notável
$ax^2+bx+c=a(x-x_{1})(x-x_{2})$

$x^2-8x+15= 1(x-3)(x-5)$

$2x^2-4x-6=2(x-3)(x+1)$

$\frac{x^2-8x+15}{2x^2-4x-6} \\\\ \frac{1(x-3)(x-5)}{2(x-3)(x+1)} \\\\ \frac{(x-5)}{2(x+1)} \\\\ \frac{x-5}{2x+2}$