Question

Am nevoie de ajutor urgent! Am nevoie de te toate exercitiile subliniate...

Answer 1

$\bf 14.\\ \\ \it i)\ \ \dfrac{x^2-8x+15}{x^2-2x-15}=\dfrac{x^2-8x+16-1}{x^2-2x+1-16}=\dfrac{(x-4)^2-1^2}{(x-1)^2-4^2}=\\ \\ \\ =\dfrac{(x-4-1)(x-4+1)}{(x-1-4)(x-1+4)}=\dfrac{(x-5)(x-3)}{(x-5)(x+3)}=\dfrac{x-3}{x+3}$