Question

Simplificati raportul;
$\frac{x^{2} -1}{5 x^{2} -4 x^{}-1 }$
$\frac{ x^{2} +6 x^{}+5 }{ x^{2} +5 x^{} }$
$\frac{ x^{2} -2 x^{}+1 }{ x^{2} -5 x^{}+4 }$

Answer 1

(x²-1)/(5x²-4x-1)=(x+1)(x-1)/(x+0,2)(x-1)= (x+1)/(x+0,2)

(x²+6x+5)/(x²+5x)=(x+1)(x+5)/x(x+5)=(x+1)/x

(x²-2x+1)/(x²-5x+4)=(x-1)²/(x-4)(x-1)=(x-1)/(x-4)