Question

Упростить:
((a^2-8a+15)/(a^2-49))*((a^2-2a-35/a^2-25))

Answer 1

$\frac{ {a}^{2} - 8a + 15 }{ {a}^{2} - 49} \times \frac{ {a}^{2} - 2a - 35 }{ {a}^{2} - 25} = \frac{(x - 3)(x - 5)}{(x - 7)(x + 7)} \times \frac{(x + 5)(x - 7)}{(x + 5)(x - 5)} = \frac{(x - 3)}{(x + 7)}$