ساده شده عبارت ${{\mathop x\nolimits^2 - 16} \over {\mathop x\nolimits^2 - 10x + 25}} \times {{\mathop x\nolimits^2 - 5x} \over {\mathop x\nolimits^2 - x - 12}}$ کدام است؟
${{x(x + 4)} \over {(x - 5)(x + 3)}}$
2 )
${{x(x - 4)} \over {(x + 5)(x + 3)}}$
3 )
${{x(x + 4)} \over {(x - 5)(x - 3)}}$
4 )
${{x(x - 4)} \over {(x - 5)(x + 3)}}$